Update Forgix

fixes a critical bug

.gitignore

@@ -26,6 +26,10 @@ Merged/
 # Folder created by the buildAll scripts
 buildAllJars/
 
+relocate_natives/.venv/
+relocate_natives/__pycache__/
+relocate_natives/apple-codesign/
+
 # file from notepad++
 *.bak
 

.gitlab-ci.yml

@@ -6,6 +6,7 @@ image: eclipse-temurin:21
 # TODO: Make stages depend on what is in versionProperties
 stages:
   - build
+  - multiversion
   - api
   - pages
 
@@ -35,26 +36,49 @@ build:
   stage: build
   parallel:
     matrix:
-      - MC_VER: ["1.16.5", "1.17.1", "1.18.2", "1.19.2", "1.19.4", "1.20.1", "1.20.2", "1.20.4", "1.20.6", "1.21.1", "1.21.3", "1.21.4"]
+      - MC_VER: ["1.16.5", "1.17.1", "1.18.2", "1.19.2", "1.19.4", "1.20.1", "1.20.2", "1.20.4", "1.20.6", "1.21.1", "1.21.3", "1.21.4", "1.21.5"]
   script:
     # this both runs the unit tests and assembles the code
-    - ./gradlew clean -PmcVer="${MC_VER}" -PinfoGitCommit="${CI_COMMIT_SHA}" -PinfoGitBranch="${CI_COMMIT_BRANCH}" -PinfoBuildSource="GitLab CI (${CI_PIPELINE_ID})" --gradle-user-home cache/;
     - ./gradlew build -PmcVer="${MC_VER}" -PinfoGitCommit="${CI_COMMIT_SHA}" -PinfoGitBranch="${CI_COMMIT_BRANCH}" -PinfoBuildSource="GitLab CI (${CI_PIPELINE_ID})" --gradle-user-home cache/;
     - ./gradlew mergeJars -PmcVer="${MC_VER}" -PinfoGitCommit="${CI_COMMIT_SHA}" -PinfoGitBranch="${CI_COMMIT_BRANCH}" -PinfoBuildSource="GitLab CI (${CI_PIPELINE_ID})" --gradle-user-home cache/;
-    - cp ./fabric/build/libs/* ./forge/build/libs/* ./neoforge/build/libs/* ./Merged/* . || true
+    - cp ./build/forgix/* . || true
+    - mkdir -p ./builds
+    - cp ./fabric/build/libs/* ./forge/build/libs/* ./neoforge/build/libs/* ./builds || true
+    # When the archive is created, the merged jar will be the main jar and a subfolder named "builds" will contain the other jars
   artifacts:
     name: "NightlyBuild_${MC_VER}-${CI_COMMIT_SHORT_SHA}-${CI_COMMIT_TIMESTAMP}"
     paths:
       - ./*.jar
+      - ./builds/*.jar
     exclude:
-      - ./*-all.jar
-      - ./*-dev.jar
-      - ./*-sources.jar
+      - ./builds/*-all.jar
+      - ./builds/*-dev.jar
+      - ./builds/*-sources.jar
     expire_in: 14 days
     when: always
   extends: .build_java
 
 
+multiversion:
+  stage: multiversion
+  needs: [build]
+  script:
+    # Create a semicolon-separated list of jar paths
+    - MC_VER_PATHS=$(find . -maxdepth 1 -name "*.jar" -type f | tr '\n' ';')
+    # Run the mergeVersions task
+    - ./gradlew mergeVersions -PmergeVersions="${MC_VER_PATHS}" -PinfoGitCommit="${CI_COMMIT_SHA}" -PinfoGitBranch="${CI_COMMIT_BRANCH}" -PinfoBuildSource="GitLab CI (${CI_PIPELINE_ID})" --gradle-user-home cache/;
+    # Clean up existing jars and make sure only the multiversion jar remains which will be uploaded
+    - rm -f ./*.jar
+    - cp ./build/forgix/multiversion/* .
+  artifacts:
+    name: "NightlyBuild_Multiversion-${CI_COMMIT_SHORT_SHA}-${CI_COMMIT_TIMESTAMP}"
+    paths:
+      - ./*.jar
+    expire_in: 30 days
+    when: always
+  extends: .build_java
+
+
 api:
   stage: api
   needs: []

.gitlab/issue_templates/Bug.md

@@ -6,13 +6,13 @@ Or click the checkbox once the issue has been created.
 -->
 
 1. [ ] Check the FAQ to see if your issue has already been reported and has a solution:
-    [Problems-and-solutions](https://gitlab.com/jeseibel/distant-horizons/-/wikis/2-frequently-asked-questions/2-problems-and-solutions/Problems-and-Solutions)
+    [Problems-and-solutions](https://gitlab.com/distant-horizons-team/distant-horizons/-/wikis/1-user-guide/1-frequently-asked-questions/2-problems-and-solutions/Problems-and-Solutions)
 
 2. [ ] Make sure you are not using any mods on the incompatible list:
-    [Mod support FAQ](https://gitlab.com/jeseibel/distant-horizons/-/wikis/2-frequently-asked-questions/4-mod-support/Mod-Support)
+    [Mod support FAQ](https://gitlab.com/distant-horizons-team/distant-horizons/-/wikis/1-user-guide/1-frequently-asked-questions/4-mod-support/Mod-Support)
 
 3. [ ] Check the existing issues to verify that your bug hasn't already been submitted: 
-    [Issues](https://gitlab.com/jeseibel/distant-horizons/-/issues/)
+    [Issues](https://gitlab.com/distant-horizons-team/distant-horizons/-/issues)
 
 4. [ ] Upload Minecraft's crash report and/or log. \
    Minecraft crash reports are located in: `.minecraft/crash-reports` \

.gitlab/issue_templates/FeatureRequest.md

@@ -1,4 +1,4 @@
-- [ ] Check the existing [feature requests](https://gitlab.com/jeseibel/distant-horizons/-/issues/?sort=updated_desc&state=opened&label_name%5B%5D=Feature) to verify that your feature hasn't already been suggested.
+- [ ] Check the existing [feature requests](https://gitlab.com/distant-horizons-team/distant-horizons/-/issues?sort=updated_desc&state=opened&label_name%5B%5D=Feature) to verify that your feature hasn't already been suggested.
 
 1. **Describe the feature**:
 

.gitlab/issue_templates/ImprovementRequest.md

@@ -1,3 +1,3 @@
-1. Check the existing [improvement requests](https://gitlab.com/jeseibel/distant-horizons/-/issues/?sort=updated_desc&state=all&label_name%5B%5D=Improvement) to verify that your improvement hasn't already been suggested.
+1. Check the existing [improvement requests](https://gitlab.com/distant-horizons-team/distant-horizons/-/issues?sort=updated_desc&state=all&label_name%5B%5D=Improvement) to verify that your improvement hasn't already been suggested.
 
 2. **Describe the improvement**:

build.gradle

@@ -1,3 +1,11 @@
+import com.github.jengelman.gradle.plugins.shadow.transformers.Transformer
+import com.github.jengelman.gradle.plugins.shadow.transformers.TransformerContext
+import org.apache.tools.zip.ZipEntry
+
+import javax.annotation.Nonnull
+import org.apache.tools.zip.ZipOutputStream
+
+
 plugins {
     id "java"
 
@@ -5,15 +13,23 @@ plugins {
     id "com.github.johnrengelman.shadow" version '8.1.1' apply false
 
     // Plugin to create merged jars
-    id "io.github.pacifistmc.forgix" version "1.2.9"
+    id "io.github.pacifistmc.forgix" version "2.0.0-SNAPSHOT.2"
 
     // Manifold preprocessor
     id "systems.manifold.manifold-gradle-plugin" version "0.0.2-alpha"
 
     // Architectury is used here only as a replacement for forge's own loom
-    id "dev.architectury.loom" version "1.7-SNAPSHOT" apply false
+    id "dev.architectury.loom" version "1.10-SNAPSHOT" apply false
 }
 
+// Sets up Forgix for multiversion merging
+forgix {
+    if (project.hasProperty('mergeVersions')) { // This is set using -PmergeVersions by the GitLab CI
+        multiversion {
+            inputJars = project.files(project.property('mergeVersions').toString().split(';'))
+        }
+    }
+}
 
 /**
  * Creates the list of preprocessors to use.
@@ -59,41 +75,64 @@ project.gradle.ext.getProperties().each { prop ->
 // Sets up manifold stuff
 writeBuildGradlePredefine(rootProject.mcVers, rootProject.mcIndex)
 
-
-
-
 // Sets up the version string (the name we use for our jar)
 rootProject.versionStr = rootProject.mod_version + "-" + rootProject.minecraft_version // + "-" + new Date().format("yyyy_MM_dd_HH_mm")
-// Forgix settings (used for merging jars)
-forgix {
-    
-    String loaderHyphenSeparatedList = ((String)gradle.builds_for).replaceAll(",", "-");
-    
-    group = "com.seibel.distanthorizons"
-    mergedJarName = "DistantHorizons-${loaderHyphenSeparatedList}-${rootProject.versionStr}.jar"
 
-    if (findProject(":forge"))
-        forge {
-            jarLocation = "build/libs/DistantHorizons-forge-${rootProject.versionStr}.jar"
-        }
-    
-    if (findProject(":neoforge"))
-        custom {
-            projectName = "neoforge"
-            jarLocation = "build/libs/DistantHorizons-neoforge-${rootProject.versionStr}.jar"
+class NativeTransformer implements Transformer {
+    private final HashMap<String, String> replacements = new HashMap()
+    private final HashMap<String, byte[]> rewrittenFiles = new HashMap()
+    private var nativeRelocator
+
+    public File rootDir
+
+    void relocateNative(String target, String replacement) {
+        if (replacement.length() > target.length()) {
+            throw new GradleException("Length of value \"${replacement}\" exceeds the length of \"${target}\": ${replacement.length()} > ${target.length()}")
         }
 
-    if (findProject(":fabric"))
-        fabric {
-            jarLocation = "build/libs/DistantHorizons-fabric-${rootProject.versionStr}.jar"
+        replacements.put(target, replacement)
+    }
+
+    @Override
+    boolean canTransformResource(@Nonnull FileTreeElement element) {
+        return replacements.keySet().stream().anyMatch {
+            element.name.startsWith(it as String)
+        }
+    }
+
+    @Override
+    void transform(@Nonnull TransformerContext context) {
+        byte[] content = context.is.readAllBytes()
+
+        if (nativeRelocator == null) {
+            nativeRelocator = new NativeRelocator(rootDir.toPath().resolve("relocate_natives"))
         }
 
-    if (findProject(":quilt"))
-        quilt {
-            jarLocation = "build/libs/DistantHorizons-quilt-${rootProject.versionStr}.jar"
-        }
+        try {
+            Map.Entry<String, String> pathReplacement = replacements.entrySet().stream().filter {
+                context.path.startsWith(it.key as String)
+            }.findFirst().orElseThrow()
 
-    removeDuplicate "com.seibel.distanthorizons"
+            String path = context.path.replace(pathReplacement.key as String, pathReplacement.value as String)
+            content = nativeRelocator.processBinary(path, content, replacements)
+
+            rewrittenFiles.put(path, content)
+        }
+        catch (Throwable e) {
+            throw new GradleException("Failed to relocate", e)
+        }
+    }
+
+    @Override
+    boolean hasTransformedResource() { return !rewrittenFiles.isEmpty() }
+
+    @Override
+    void modifyOutputStream(@Nonnull ZipOutputStream os, boolean preserveFileTimestamps) {
+        for (Map.Entry<String, byte[]> rewrittenFile : rewrittenFiles.entrySet()) {
+            os.putNextEntry(new ZipEntry(rewrittenFile.key))
+            os.write(rewrittenFile.value)
+        }
+    }
 }
 
 subprojects { p ->
@@ -306,26 +345,20 @@ subprojects { p ->
         
         // Logging
         relocate "org.slf4j", "${librariesLocation}.slf4j"
-        
-//        // Sqlite Database
-//        // James can't determine how to relocate the library correctly so this is commented out
-//        relocate ("org.sqlite", "${librariesLocation}.sqlite") {
-//            exclude("org/sqlite/core/NativeDB/**")
-//
-//            exclude("org/sqlite/native/FreeBSD/**")
-//            exclude("org/sqlite/native/Linux-Android/**")
-//            exclude("org/sqlite/native/Linux-Musl/**")
-//            exclude("org/sqlite/native/Linux/arm/**")
-//            exclude("org/sqlite/native/Linux/aarch64/**")
-//            exclude("org/sqlite/native/Linux/armv6/**")
-//            exclude("org/sqlite/native/Linux/x86/**")
-//            exclude("org/sqlite/native/Linux/armv7/**")
-//            exclude("org/sqlite/native/Linux/ppc64/**")
-//            exclude("org/sqlite/native/Linux/riscv64/**")
-//            exclude("org/sqlite/native/Windows/armv7/**")
-//            exclude("org/sqlite/native/Windows/aarch64/**")
-//            exclude("org/sqlite/native/Windows/armv7/**")
-//        }
+
+        // Sqlite Database
+        // librariesLocation isn't used because it's too long for replacing paths in native libraries
+        // Allowing strings larger than the original string would require shifting the entire binary's contents
+        relocate "org.sqlite", "dh_sqlite", {
+            exclude "org/sqlite/native/**"
+        }
+        relocate "jdbc:sqlite", "jdbc:dh_sqlite"
+
+        transform(NativeTransformer) {
+            rootDir = project.rootDir
+            relocateNative "org/sqlite", "dh_sqlite"
+            relocateNative "org_sqlite", "dh_1sqlite"
+        }
         
         
         // JOML
@@ -500,8 +533,9 @@ allprojects { p ->
     apply plugin: "java"
     apply plugin: "maven-publish"
     
+    // Sets the name of the jar, the version will contain the name of the project if it isn't the root project
     archivesBaseName = rootProject.mod_name
-    version = project.name + "-" + rootProject.versionStr
+    version = (project == rootProject ? "" : project.name + "-") + rootProject.versionStr
     group = rootProject.maven_group
     
     // this is the text that appears at the top of the overview (home) page
@@ -666,14 +700,3 @@ allprojects { p ->
         withSourcesJar()
     }
 }
-
-
-// Delete the merged folder when running clean
-task cleanMergedJars() {
-    def mergedFolder = file("Merged")
-    if (mergedFolder.exists()) {
-        delete(mergedFolder)
-    }
-}
-// add cleanMergedJars to the end of the "clean" task
-tasks["clean"].finalizedBy(cleanMergedJars)

buildAll.bat

@@ -14,7 +14,7 @@ for %%f in (versionProperties\*) do (
 
     @rem Clean out the folders, build it, and merge it
     echo ==================== Cleaning workspace to build !version! ====================
-    call .\gradlew.bat clean -PmcVer="!version!"
+    call .\gradlew.bat clean
     echo ==================== Building !version! ====================
     call .\gradlew.bat build -PmcVer="!version!"
     echo ==================== Merging !version! ====================

buildSrc/src/main/java/NativeRelocator.java

@@ -0,0 +1,211 @@
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.Map;
+import java.util.concurrent.CompletableFuture;
+
+class NativeRelocator
+{
+	private final Path rootDirectory;
+	private final Path cacheRoot;
+	
+	/**
+	 * Initializes the NativeRelocator by preparing the environment if necessary.
+	 * Executes the appropriate preparation script based on the OS.
+	 */
+	NativeRelocator(Path rootDirectory)
+	{
+		this.rootDirectory = rootDirectory;
+		this.cacheRoot = this.rootDirectory.resolve("cache");
+	}
+	
+	private void prepare() throws Exception
+	{
+		if (this.rootDirectory.resolve(".venv").toFile().exists())
+		{
+			return;
+		}
+		
+		ProcessBuilder processBuilder = new ProcessBuilder();
+		processBuilder.directory(this.rootDirectory.toFile());
+		
+		String os = System.getProperty("os.name").toLowerCase();
+		if (os.contains("win"))
+		{
+			processBuilder.command("powershell", "-ExecutionPolicy", "Bypass", "./prepare.ps1");
+		}
+		else if (os.contains("nix") || os.contains("nux") || os.contains("mac"))
+		{
+			processBuilder.command("./prepare.sh");
+		}
+		else
+		{
+			throw new IllegalStateException("Unsupported operating system: " + os);
+		}
+		
+		Process process = processBuilder.start();
+		CompletableFuture<Void> outputFuture = readOutputStreams(process);
+		
+		int exitCode = process.waitFor();
+		outputFuture.get();
+		
+		if (exitCode != 0)
+		{
+			throw new Exception("Prepare failed: " + exitCode);
+		}
+	}
+	
+	/**
+	 * Reads and prints the output and error streams of a process asynchronously.
+	 *
+	 * @param process The process whose streams should be read.
+	 * @return A CompletableFuture that completes once all output has been processed.
+	 */
+	private static CompletableFuture<Void> readOutputStreams(Process process)
+	{
+		return CompletableFuture.runAsync(() -> {
+			try
+			{
+				while (process.isAlive() || process.getInputStream().available() > 0 || process.getErrorStream().available() > 0)
+				{
+					if (process.getInputStream().available() > 0)
+					{
+						byte[] data = new byte[process.getInputStream().available()];
+						//noinspection ResultOfMethodCallIgnored
+						process.getInputStream().read(data);
+						System.out.write(data);
+					}
+					if (process.getErrorStream().available() > 0)
+					{
+						byte[] data = new byte[process.getErrorStream().available()];
+						//noinspection ResultOfMethodCallIgnored
+						process.getErrorStream().read(data);
+						System.err.write(data);
+					}
+					
+					//noinspection BusyWait
+					Thread.sleep(100);
+				}
+			}
+			catch (Throwable ignored)
+			{
+			}
+		});
+	}
+	
+	/**
+	 * Replaces occurrences of a target string in a byte array, ensuring null termination.
+	 *
+	 * @param byteArray The byte array where replacements should occur.
+	 * @param target The string to replace.
+	 * @param replacement The replacement string (must not be longer than the target).
+	 * @throws IllegalArgumentException if the replacement is longer than the target.
+	 */
+	private void replaceInNullTerminatedStrings(byte[] byteArray, String target, String replacement)
+	{
+		if (target.length() < replacement.length())
+		{
+			throw new IllegalArgumentException("Replacement must be the same length or shorter than the target.");
+		}
+		
+		byte[] targetBytes = target.getBytes(StandardCharsets.US_ASCII);
+		byte[] replacementBytes = replacement.getBytes(StandardCharsets.US_ASCII);
+		
+		byte nullByte = 0;
+		
+		for (int endPos = 0; endPos < byteArray.length - targetBytes.length - 1; endPos++)
+		{
+			int startPos = endPos;
+			int targetPos = 0;
+			while (targetPos < targetBytes.length && byteArray[endPos] == targetBytes[targetPos])
+			{
+				targetPos++;
+				endPos++;
+			}
+			
+			if (targetPos == targetBytes.length)
+			{
+				System.arraycopy(replacementBytes, 0, byteArray, startPos, replacementBytes.length);
+				
+				startPos = startPos + replacementBytes.length;
+				while (byteArray[endPos] != nullByte)
+				{
+					byteArray[startPos] = byteArray[endPos];
+					endPos++;
+					startPos++;
+				}
+				byteArray[startPos] = nullByte;
+			}
+		}
+	}
+	
+	/**
+	 * Runs an external script to fix a modified binary and returns the processed content.
+	 *
+	 * @param outputFilePath Path to store the processed binary.
+	 * @param content The original binary content.
+	 * @return The modified binary content.
+	 * @throws Exception if the process execution fails.
+	 */
+	public byte[] fixModifiedBinary(Path outputFilePath, byte[] content) throws Exception
+	{
+		ProcessBuilder processBuilder = new ProcessBuilder();
+		processBuilder.directory(this.rootDirectory.toFile());
+		
+		processBuilder.command(
+				this.rootDirectory.resolve(".venv/Scripts").toFile().exists()
+						? this.rootDirectory.resolve(".venv/Scripts/python.exe").toString()
+						: this.rootDirectory.resolve(".venv/bin/python").toString(),
+				"./fix_modified_binary.py",
+				outputFilePath.toString()
+		);
+		
+		Process process = processBuilder.start();
+		CompletableFuture<Void> outputFuture = readOutputStreams(process);
+		
+		process.getOutputStream().write(content);
+		process.getOutputStream().close();
+		
+		int exitCode = process.waitFor();
+		outputFuture.get();
+		
+		if (exitCode != 0)
+		{
+			throw new Exception("Process failed: " + exitCode);
+		}
+		
+		return Files.readAllBytes(outputFilePath);
+	}
+	
+	/**
+	 * Processes a binary file, applying string replacements and fixing modifications.
+	 *
+	 * @param outputPath The output file path relative to the cache directory.
+	 * @param content The binary content to process.
+	 * @param replacements A map of string replacements to apply.
+	 * @return The modified binary content.
+	 * @throws Exception if processing fails.
+	 */
+	public byte[] processBinary(String outputPath, byte[] content, Map<String, String> replacements) throws Exception
+	{
+		Path outputFilePath = this.cacheRoot.resolve(outputPath);
+		//noinspection ResultOfMethodCallIgnored
+		outputFilePath.getParent().toFile().mkdirs();
+		
+		if (outputFilePath.toFile().exists())
+		{
+			return Files.readAllBytes(outputFilePath);
+		}
+		
+		System.out.println("Relocating to " + outputPath + "...");
+		this.prepare();
+		
+		for (Map.Entry<String, String> replacement : replacements.entrySet())
+		{
+			this.replaceInNullTerminatedStrings(content, replacement.getKey(), replacement.getValue());
+		}
+		
+		return this.fixModifiedBinary(outputFilePath, content);
+	}
+	
+}

common/src/main/java/com/seibel/distanthorizons/common/AbstractPluginPacketSender.java

@@ -1,6 +1,7 @@
 package com.seibel.distanthorizons.common;
 
 import com.seibel.distanthorizons.core.config.Config;
+import com.seibel.distanthorizons.core.dependencyInjection.SingletonInjector;
 import com.seibel.distanthorizons.core.logging.ConfigBasedLogger;
 import com.seibel.distanthorizons.core.network.event.internal.IncompatibleMessageInternalEvent;
 import com.seibel.distanthorizons.core.network.event.internal.ProtocolErrorInternalEvent;
@@ -30,6 +31,16 @@ public abstract class AbstractPluginPacketSender implements IPluginPacketSender
 	public static final ResourceLocation WRAPPER_PACKET_RESOURCE = new ResourceLocation(ModInfo.RESOURCE_NAMESPACE, ModInfo.WRAPPER_PACKET_PATH);
 	#endif
 	
+	// "Forge byte" is an unused packet ID. We have our own system which works with all mod loaders,
+	// so we're just accounting for it by reading the protocol version as a byte instead of a short in Forge, to keep cross-loader compatibility
+	private final boolean forgeByteInProtocolVersion;
+	
+	
+	public AbstractPluginPacketSender() { this(false); }
+	public AbstractPluginPacketSender(boolean forgeByteInProtocolVersion)
+	{
+		this.forgeByteInProtocolVersion = forgeByteInProtocolVersion;
+	}
 	
 	@Override
 	public final void sendToClient(IServerPlayerWrapper serverPlayer, AbstractNetworkMessage message)
@@ -41,7 +52,7 @@ public abstract class AbstractPluginPacketSender implements IPluginPacketSender
 	@Override
 	public abstract void sendToServer(AbstractNetworkMessage message);
 	
-	public static AbstractNetworkMessage decodeMessage(FriendlyByteBuf in)
+	public AbstractNetworkMessage decodeMessage(FriendlyByteBuf in)
 	{
 		AbstractNetworkMessage message = null;
 		
@@ -49,7 +60,7 @@ public abstract class AbstractPluginPacketSender implements IPluginPacketSender
 		{
 			in.markReaderIndex();
 			
-			int protocolVersion = in.readShort();
+			int protocolVersion = this.forgeByteInProtocolVersion ? in.readByte() : in.readShort();
 			if (protocolVersion != ModInfo.PROTOCOL_VERSION)
 			{
 				return new IncompatibleMessageInternalEvent(protocolVersion);
@@ -82,11 +93,19 @@ public abstract class AbstractPluginPacketSender implements IPluginPacketSender
 		}
 	}
 	
-	public static void encodeMessage(FriendlyByteBuf out, AbstractNetworkMessage message)
+	public void encodeMessage(FriendlyByteBuf out, AbstractNetworkMessage message)
 	{
 		// This is intentionally unhandled, because errors related to this are unlikely to appear in wild
 		Objects.requireNonNull(message);
-		out.writeShort(ModInfo.PROTOCOL_VERSION);
+		
+		if (this.forgeByteInProtocolVersion)
+		{
+			out.writeByte(ModInfo.PROTOCOL_VERSION);
+		}
+		else
+		{
+			out.writeShort(ModInfo.PROTOCOL_VERSION);
+		}
 		
 		try
 		{

common/src/main/java/com/seibel/distanthorizons/common/CommonPacketPayload.java

@@ -2,7 +2,9 @@ package com.seibel.distanthorizons.common;
 
 #if MC_VER >= MC_1_20_6
 
+import com.seibel.distanthorizons.core.dependencyInjection.SingletonInjector;
 import com.seibel.distanthorizons.core.network.messages.AbstractNetworkMessage;
+import com.seibel.distanthorizons.core.wrapperInterfaces.misc.IPluginPacketSender;
 import net.minecraft.network.FriendlyByteBuf;
 import net.minecraft.network.codec.StreamCodec;
 import net.minecraft.network.protocol.common.custom.CustomPacketPayload;
@@ -12,6 +14,7 @@ import org.jetbrains.annotations.Nullable;
 public record CommonPacketPayload(@Nullable AbstractNetworkMessage message) implements CustomPacketPayload
 {
 	public static final Type<CommonPacketPayload> TYPE = new Type<>(AbstractPluginPacketSender.WRAPPER_PACKET_RESOURCE);
+	private static final AbstractPluginPacketSender PACKET_SENDER = (AbstractPluginPacketSender) SingletonInjector.INSTANCE.get(IPluginPacketSender.class);
 	
 	@NotNull
 	@Override
@@ -23,11 +26,11 @@ public record CommonPacketPayload(@Nullable AbstractNetworkMessage message) impl
 		@NotNull
 		@Override
 		public CommonPacketPayload decode(@NotNull FriendlyByteBuf in)
-		{ return new CommonPacketPayload(AbstractPluginPacketSender.decodeMessage(in)); }
+		{ return new CommonPacketPayload(PACKET_SENDER.decodeMessage(in)); }
 		
 		@Override
 		public void encode(@NotNull FriendlyByteBuf out, CommonPacketPayload payload)
-		{ AbstractPluginPacketSender.encodeMessage(out, payload.message()); }
+		{ PACKET_SENDER.encodeMessage(out, payload.message()); }
 		
 	}
 	

common/src/main/java/com/seibel/distanthorizons/common/commands/ConfigCommand.java

@@ -9,6 +9,7 @@ import com.seibel.distanthorizons.core.config.types.ConfigEntry;
 import net.minecraft.commands.CommandSourceStack;
 
 import java.util.Arrays;
+import java.util.HashSet;
 import java.util.List;
 import java.util.function.BiFunction;
 import java.util.function.Function;
@@ -40,6 +41,7 @@ public class ConfigCommand extends AbstractCommand
 	public LiteralArgumentBuilder<CommandSourceStack> buildCommand()
 	{
 		LiteralArgumentBuilder<CommandSourceStack> builder = literal("config");
+		HashSet<String> addedCommands = new HashSet<>();
 		
 		for (AbstractConfigType<?, ?> type : ConfigBase.INSTANCE.entries)
 		{
@@ -56,6 +58,11 @@ public class ConfigCommand extends AbstractCommand
 				continue;
 			}
 			
+			if (!addedCommands.add(configEntry.getChatCommandName()))
+			{
+				throw new IllegalStateException("Duplicate command name: " + configEntry.getChatCommandName());
+			}
+			
 			LiteralArgumentBuilder<CommandSourceStack> subcommand = literal(configEntry.getChatCommandName())
 					.executes(commandContext -> this.sendSuccessResponse(commandContext,
 							"\n" +

common/src/main/java/com/seibel/distanthorizons/common/wrappers/VersionConstants.java

@@ -20,8 +20,6 @@
 package com.seibel.distanthorizons.common.wrappers;
 
 import com.seibel.distanthorizons.core.wrapperInterfaces.IVersionConstants;
-import net.minecraft.SharedConstants;
-import net.minecraft.client.Minecraft;
 
 /**
  * @author James Seibel
@@ -38,32 +36,48 @@ public class VersionConstants implements IVersionConstants
 	}
 	
 	
-	@Override
-	public int getMinimumWorldHeight()
-	{
-		return 0;
-	}
-	
-	@Override
-	public int getWorldGenerationCountPerThread()
-	{
-		return 1;
-	}
-	
-	@Override
-	public boolean isVanillaRenderedChunkSquare()
-	{
-		return false;
-	}
-	
 	@Override
 	public String getMinecraftVersion()
 	{
-		#if MC_VER < MC_1_19_2
-		return Minecraft.getInstance().getGame().getVersion().getId();
+		// these values are hard-coded to prevent an issue with Forge (specifically 1.18.2) where
+		// it can't load client classes when running as a dedicated server,
+		// which was how we were dynamically accessing the MC version string
+		
+		#if MC_VER == MC_1_16_5
+			return "1.16.5";
+		
+		#elif MC_VER == MC_1_17_1
+			return "1.17.1";
+		
+		#elif MC_VER == MC_1_18_2
+			return "1.18.2";
+		
+		#elif MC_VER == MC_1_19_2
+			return "1.19.2";
+		#elif MC_VER == MC_1_19_4
+			return "1.19.4";
+		
+		#elif MC_VER == MC_1_20_1
+			return "1.20.1";
+		#elif MC_VER == MC_1_20_2
+			return "1.20.2";
+		#elif MC_VER == MC_1_20_4
+			return "1.20.4";
+		#elif MC_VER == MC_1_20_6
+			return "1.20.6";
+		
+		#elif MC_VER == MC_1_21_1
+			return "1.21.1";
+		#elif MC_VER == MC_1_21_3
+			return "1.21.3";
+		#elif MC_VER == MC_1_21_4
+			return "1.21.4";
+		#elif MC_VER == MC_1_21_5
+			return "1.21.5";
 		#else
-		return SharedConstants.getCurrentVersion().getId();
+			ERROR MC version constant missing
 		#endif
+		
 	}
 	
 }

common/src/main/java/com/seibel/distanthorizons/common/wrappers/block/BlockStateWrapper.java

@@ -43,6 +43,8 @@ import java.util.*;
 import java.util.List;
 import java.util.concurrent.ConcurrentHashMap;
 
+import org.jetbrains.annotations.Nullable;
+
 #if MC_VER == MC_1_16_5 || MC_VER == MC_1_17_1
 import net.minecraft.core.Registry;
 import net.minecraft.core.BlockPos;
@@ -84,26 +86,25 @@ public class BlockStateWrapper implements IBlockStateWrapper
 	public static HashSet<IBlockStateWrapper> rendererIgnoredCaveBlocks = null;
 	
 	/** keep track of broken blocks so we don't log every time */
-	private static final HashSet<ResourceLocation> BrokenResourceLocations = new HashSet<>();
+	private static final HashSet<ResourceLocation> BROKEN_RESOURCE_LOCATIONS = new HashSet<>();
 	
 	
 	
 	// properties //
 	
+	@Nullable
 	public final BlockState blockState;
 	/** technically final, but since it requires a method call to generate it can't be marked as such */
 	private String serialString;
 	private final int hashCode;
-	/** 
-	 * Cached opacity value, -1 if not populated. <br>
-	 * Should be between {@link LodUtil#BLOCK_FULLY_OPAQUE} and {@link LodUtil#BLOCK_FULLY_OPAQUE}
-	 */
-	private int opacity = -1;
+	/** Should be between {@link LodUtil#BLOCK_FULLY_OPAQUE} and {@link LodUtil#BLOCK_FULLY_OPAQUE} */
+	private final int opacity;
 	/** used by the Iris shader mod to determine how each LOD should be rendered */
 	private byte blockMaterialId = 0;
 	
 	private final boolean isBeaconBlock; 
 	private final boolean isBeaconBaseBlock;
+	private final boolean allowsBeaconBeamPassage;
 	/** null if this block can't tint beacons */
 	private final Color beaconTintColor; 
 	private final Color mapColor;
@@ -160,9 +161,12 @@ public class BlockStateWrapper implements IBlockStateWrapper
 		this.serialString = this.serialize(levelWrapper);
 		this.hashCode = Objects.hash(this.serialString);
 		this.blockMaterialId = this.calculateEDhApiBlockMaterialId().index;
+		this.opacity = this.calculateOpacity();
+		
+		String lowercaseSerial = this.serialString.toLowerCase();
+		
 		
 		// beacon blocks
-		String lowercaseSerial = this.serialString.toLowerCase();
 		boolean isBeaconBaseBlock = false;
 		for (int i = 0; i < LodUtil.BEACON_BASE_BLOCK_NAME_LIST.size(); i++)
 		{
@@ -198,6 +202,39 @@ public class BlockStateWrapper implements IBlockStateWrapper
 		this.beaconTintColor = beaconTintColor;
 		
 		
+		// allow/deny beacon beam passage 
+		boolean allowsBeaconBeamPassage;
+		if (this.blockState != null)
+		{
+			// get block properties (defaults to the values used by air)
+			boolean canOcclude = this.getCanOcclude();
+			boolean propagatesSkyLightDown = this.getPropagatesSkyLightDown();
+			
+			if (lowercaseSerial.contains("minecraft:bedrock"))
+			{
+				// bedrock is a special case fully opaque block that does allow beacons through
+				allowsBeaconBeamPassage = true;
+			}
+			else if (propagatesSkyLightDown || !canOcclude)
+			{
+				// stairs, cake, fences, etc.
+				allowsBeaconBeamPassage = true;
+			}
+			else
+			{
+				// non-opaque blocks (glass, mob spawners, etc.)
+				// all allow beacons through
+				allowsBeaconBeamPassage = (this.opacity != LodUtil.BLOCK_FULLY_OPAQUE);
+			}
+		}
+		else
+		{
+			// air allows beacons through
+			allowsBeaconBeamPassage = true;
+		}
+		this.allowsBeaconBeamPassage = allowsBeaconBeamPassage;
+		
+		
 		int mcColor = 0;
 		if (this.blockState != null)
 		{
@@ -341,13 +378,13 @@ public class BlockStateWrapper implements IBlockStateWrapper
 	//=================//
 	
 	@Override
-	public int getOpacity()
+	public int getOpacity() { return this.opacity; }
+	private int calculateOpacity()
 	{
-		// use the cached opacity value if possible
-		if (this.opacity != -1)
-		{
-			return this.opacity;
-		}
+		// get block properties (defaults to the values used by air)
+		boolean canOcclude = this.getCanOcclude();
+		boolean propagatesSkyLightDown = this.getPropagatesSkyLightDown();
+		
 		
 		
 		// this method isn't perfect, but works well enough for our use case
@@ -356,19 +393,20 @@ public class BlockStateWrapper implements IBlockStateWrapper
 		{
 			opacity = LodUtil.BLOCK_FULLY_TRANSPARENT;
 		}
-		else if (this.isLiquid() && !this.blockState.canOcclude())
+		else if (this.isLiquid() && !canOcclude)
 		{
 			// probably not a waterlogged block (which should block light entirely)
 			
 			// +1 to indicate that the block is translucent (in between transparent and opaque) 
 			opacity = LodUtil.BLOCK_FULLY_TRANSPARENT + 1;
 		}
-		#if MC_VER < MC_1_21_3
-		else if (this.blockState.propagatesSkylightDown(EmptyBlockGetter.INSTANCE, BlockPos.ZERO))
-		#else
-		else if (this.blockState.propagatesSkylightDown())
-		#endif
+		else if (propagatesSkyLightDown && !canOcclude)
 		{
+			// probably glass or some other fully transparent block
+			
+			// !canOcclude is required to ignore stairs and slabs since
+			// propagateSkyLightDown is true for them, but they're solid and don't actually let light through
+			
 			opacity = LodUtil.BLOCK_FULLY_TRANSPARENT;
 		}
 		else
@@ -378,9 +416,37 @@ public class BlockStateWrapper implements IBlockStateWrapper
 		}
 		
 		
-		this.opacity = opacity;
-		return this.opacity;
+		return opacity;
 	}
+	private boolean getCanOcclude()
+	{
+		// defaults to the value used by air
+		boolean canOcclude = false;
+		if (this.blockState != null)
+		{
+			canOcclude = this.blockState.canOcclude();
+		}
+		
+		return canOcclude;
+	}
+	private boolean getPropagatesSkyLightDown()
+	{
+		// defaults to the value used by air
+		boolean propagatesSkyLightDown = true;
+		if (this.blockState != null)
+		{
+			#if MC_VER < MC_1_21_3
+			propagatesSkyLightDown = this.blockState.propagatesSkylightDown(EmptyBlockGetter.INSTANCE, BlockPos.ZERO);
+			#else
+			propagatesSkyLightDown = this.blockState.propagatesSkylightDown();
+			#endif
+		}
+		
+		return propagatesSkyLightDown;
+	}
+	
+	
+	
 	
 	@Override
 	public int getLightEmission() { return (this.blockState != null) ? this.blockState.getLightEmission() : 0; }
@@ -453,6 +519,8 @@ public class BlockStateWrapper implements IBlockStateWrapper
 	public boolean isBeaconBaseBlock() { return this.isBeaconBaseBlock; }
 	@Override
 	public boolean isBeaconTintBlock() { return this.beaconTintColor != null; }
+	@Override
+	public boolean allowsBeaconBeamPassage() { return this.allowsBeaconBeamPassage; }
 	
 	@Override
 	public Color getMapColor() { return this.mapColor; }
@@ -596,9 +664,9 @@ public class BlockStateWrapper implements IBlockStateWrapper
 				if (block == null)
 				{
 					// shouldn't normally happen, but here to make the compiler happy
-					if (!BrokenResourceLocations.contains(resourceLocation))
+					if (!BROKEN_RESOURCE_LOCATIONS.contains(resourceLocation))
 					{
-						BrokenResourceLocations.add(resourceLocation);
+						BROKEN_RESOURCE_LOCATIONS.add(resourceLocation);
 						LOGGER.warn("Unable to find BlockState with the resourceLocation [" + resourceLocation + "] and properties: [" + blockStatePropertiesString + "]. Air will be used instead, some data may be lost.");
 					}
 					
@@ -628,9 +696,9 @@ public class BlockStateWrapper implements IBlockStateWrapper
 					if (blockStatePropertiesString != null)
 					{
 						// we should have found a blockstate, but didn't
-						if (!BrokenResourceLocations.contains(resourceLocation))
+						if (!BROKEN_RESOURCE_LOCATIONS.contains(resourceLocation))
 						{
-							BrokenResourceLocations.add(resourceLocation);
+							BROKEN_RESOURCE_LOCATIONS.add(resourceLocation);
 							LOGGER.warn("Unable to find BlockState for Block [" + resourceLocation + "] with properties: [" + blockStatePropertiesString + "]. Using the default block state.");
 						}
 					}

common/src/main/java/com/seibel/distanthorizons/common/wrappers/block/ClientBlockStateColorCache.java

@@ -40,11 +40,18 @@ import java.util.Random;
 #endif
 import net.minecraft.world.level.block.state.BlockState;
 import org.apache.logging.log4j.Logger;
+import org.jetbrains.annotations.Nullable;
 
+import java.util.ArrayList;
 import java.util.HashSet;
 import java.util.List;
 import java.util.concurrent.locks.ReentrantLock;
 
+#if MC_VER < MC_1_21_5
+#else
+import net.minecraft.client.renderer.block.model.BlockModelPart;
+#endif
+
 /**
  * This stores and calculates the colors
  * the given {@link BlockState} should have based
@@ -196,9 +203,7 @@ public class ClientBlockStateColorCache
 				List<BakedQuad> quads = null;
 				for (Direction direction : COLOR_RESOLUTION_DIRECTION_ORDER)
 				{
-					quads = Minecraft.getInstance().getModelManager().getBlockModelShaper().
-							getBlockModel(this.blockState).getQuads(this.blockState, direction, RANDOM);
-					
+					quads = this.getQuadsForDirection(direction);
 					if (quads != null && !quads.isEmpty()
 						&& !(
 							this.blockState.getBlock() instanceof RotatedPillarBlock
@@ -212,19 +217,37 @@ public class ClientBlockStateColorCache
 				
 				if (quads == null || quads.isEmpty())
 				{
-					quads = Minecraft.getInstance().getModelManager().getBlockModelShaper().
-							getBlockModel(this.blockState).getQuads(this.blockState, null, RANDOM);
+					quads = this.getUnculledQuads();
 				}
 				
-				if (quads != null && !quads.isEmpty())
+				if (quads != null 
+					&& !quads.isEmpty() 
+					&& quads.get(0) != null)
 				{
-					this.needPostTinting = quads.get(0).isTinted();
-					this.needShade = quads.get(0).isShade();
-					this.tintIndex = quads.get(0).getTintIndex();
+					BakedQuad firstQuad = quads.get(0);
+					
+					this.needPostTinting = firstQuad.isTinted();
+					#if MC_VER <= MC_1_21_4
+					this.needShade = firstQuad.isShade();
+					this.tintIndex = firstQuad.getTintIndex();
+					#else
+					this.needShade = firstQuad.shade();
+					this.tintIndex = firstQuad.tintIndex();
+					#endif
+					
+					#if MC_VER < MC_1_17_1
 					this.baseColor = calculateColorFromTexture(
-	                        #if MC_VER < MC_1_17_1 quads.get(0).sprite,
-							#else quads.get(0).getSprite(), #endif
-							ColorMode.getColorMode(this.blockState.getBlock()));
+                        firstQuad.sprite,
+						ColorMode.getColorMode(this.blockState.getBlock()));
+					#elif MC_VER < MC_1_21_5
+					this.baseColor = calculateColorFromTexture(
+                        firstQuad.getSprite(),
+						ColorMode.getColorMode(this.blockState.getBlock()));
+					#else
+					this.baseColor = calculateColorFromTexture(
+						firstQuad.sprite(),
+						ColorMode.getColorMode(this.blockState.getBlock()));
+					#endif
 				}
 				else
 				{
@@ -232,8 +255,7 @@ public class ClientBlockStateColorCache
 					this.needPostTinting = false;
 					this.needShade = false;
 					this.tintIndex = 0;
-					this.baseColor = calculateColorFromTexture(Minecraft.getInstance().getModelManager().getBlockModelShaper().getParticleIcon(this.blockState),
-							ColorMode.getColorMode(this.blockState.getBlock()));
+					this.baseColor = this.getParticleIconColor();
 				}
 			}
 			else
@@ -242,8 +264,7 @@ public class ClientBlockStateColorCache
 				this.needPostTinting = true;
 				this.needShade = false;
 				this.tintIndex = 0;
-				this.baseColor = calculateColorFromTexture(Minecraft.getInstance().getModelManager().getBlockModelShaper().getParticleIcon(this.blockState),
-						ColorMode.getColorMode(this.blockState.getBlock()));
+				this.baseColor = this.getParticleIconColor();
 			}
 			
 			this.isColorResolved = true;
@@ -253,6 +274,35 @@ public class ClientBlockStateColorCache
 			RESOLVE_LOCK.unlock();
 		}
 	}
+	
+	@Nullable
+	private List<BakedQuad> getUnculledQuads() { return this.getQuadsForDirection(null); }
+	@Nullable
+	private List<BakedQuad> getQuadsForDirection(@Nullable Direction direction)
+	{
+		List<BakedQuad> quads = null;
+		
+		#if MC_VER < MC_1_21_5
+		quads = Minecraft.getInstance().getModelManager().getBlockModelShaper().
+				getBlockModel(this.blockState).getQuads(this.blockState, direction, RANDOM);
+		#else
+		List<BlockModelPart> blockModelPartList = Minecraft.getInstance().getModelManager().getBlockModelShaper().
+				getBlockModel(this.blockState).collectParts(RANDOM);
+		
+		quads = new ArrayList<>();
+		if (blockModelPartList != null)
+		{
+			for (int i = 0; i < blockModelPartList.size(); i++)
+			{
+				// if direction is null this will return the unculled quads
+				quads.addAll(blockModelPartList.get(i).getQuads(direction));
+			}
+		}
+		#endif
+		
+		return quads;
+	}
+	
 	//TODO: Perhaps make this not just use the first frame?
 	private static int calculateColorFromTexture(TextureAtlasSprite texture, ColorMode colorMode)
 	{
@@ -383,6 +433,13 @@ public class ClientBlockStateColorCache
 		return (bias + (scale * t)) >>> 16;
 	}
 	
+	private int getParticleIconColor()
+	{
+		return calculateColorFromTexture(
+				Minecraft.getInstance().getModelManager().getBlockModelShaper().getParticleIcon(this.blockState),
+				ColorMode.getColorMode(this.blockState.getBlock()));
+	}
+	
 	
 	
 	//===============//

common/src/main/java/com/seibel/distanthorizons/common/wrappers/block/TintWithoutLevelOverrider.java

@@ -19,19 +19,16 @@
 
 package com.seibel.distanthorizons.common.wrappers.block;
 
-import com.seibel.distanthorizons.core.logging.DhLoggerBuilder;
 import com.seibel.distanthorizons.core.util.ColorUtil;
 import com.seibel.distanthorizons.core.wrapperInterfaces.world.IClientLevelWrapper;
 import net.minecraft.core.BlockPos;
 import net.minecraft.core.Direction;
 import net.minecraft.world.level.*;
 import net.minecraft.world.level.biome.Biome;
-import net.minecraft.world.level.biome.Biomes;
 import net.minecraft.world.level.block.entity.BlockEntity;
 import net.minecraft.world.level.block.state.BlockState;
 import net.minecraft.world.level.lighting.LevelLightEngine;
 import net.minecraft.world.level.material.FluidState;
-import org.apache.logging.log4j.Logger;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
@@ -46,46 +43,74 @@ public class TintWithoutLevelOverrider implements BlockAndTintGetter
 	 * but {@link Nullable} is there just in case. 
 	 */
 	@Nullable
-	private final Biome biome;
-	
-	
+	#if MC_VER >= MC_1_18_2
+	public final Holder<Biome> biome;
+	#else
+	public final Biome biome;
+	#endif
 	
+	/**
+	 * Constructs the TintWithoutLevelOverrider, storing the provided Biome Holder for late-binding access.
+	 *
+	 * <p>Previously, this class might have immediately unwrapped the Holder like this:</p>
+	 * <pre>{@code
+	 * // Inside constructor (OLD WAY - PROBLEMATIC):
+	 * Holder<Biome> biomeHolder = getTheHolderFromSomewhere();
+	 * this.biome = biomeHolder.value(); // <-- PROBLEM HERE
+	 * }</pre>
+	 *
+	 * <p>This approach is problematic because the {@link net.minecraft.core.Holder} system,
+	 * particularly {@code Holder.Reference}, is designed for <strong>late binding</strong>. Here's why storing
+	 * the Holder itself is now necessary:</p>
+	 * <ol>
+	 *   <li>A {@code Holder.Reference<Biome>} might be created initially just with a
+	 *       {@link net.minecraft.resources.ResourceKey} (like {@code minecraft:plains}), but its actual
+	 *       {@link net.minecraft.core.Holder#value() value()} (the {@code Biome} object itself) might be {@code null}
+	 *       at construction time.</li>
+	 *   <li>Later, during game loading, registry population, or potentially due to modifications by other mods
+	 *       (e.g., Polytone), the system calls internal binding methods (like {@code bindValue(Biome)})
+	 *       on the {@code Holder} instance. This sets or <strong>updates</strong> the internal reference to the
+	 *       actual {@code Biome} object.</li>
+	 *   <li>Crucially, the binding process might assign a completely <strong>new</strong> {@code Biome} object
+	 *       instance to the {@code Holder} reference, replacing any previous one.</li>
+	 * </ol>
+	 *
+	 * <p>If we unwrapped the {@code Holder} using {@code .value()} within the constructor (the old way),
+	 * our class's internal {@code biome} field would permanently store a reference to whatever {@code Biome}
+	 * object the {@code Holder} pointed to *at that exact moment*. It would have no link back to the
+	 * {@code Holder} and would be unaware if the {@code Holder} was later updated to point to a different
+	 * (or the initially missing) {@code Biome} object. This would lead to using stale or even {@code null} data.</p>
+	 *
+	 * <p>By storing the {@code Holder<Biome>} itself, this class can call {@link net.minecraft.core.Holder#value()}
+	 * whenever the biome information is needed, ensuring it always retrieves the most current {@code Biome}
+	 * instance associated with the holder at that time.</p>
+	 */
 	public TintWithoutLevelOverrider(BiomeWrapper biomeWrapper, IClientLevelWrapper clientLevelWrapper)
 	{
-		// try to get the wrapped biome
-		Biome unwrappedBiome = null;
-		if (biomeWrapper.biome != null)
+		#if MC_VER >= MC_1_18_2 Holder<Biome> #else Biome #endif biome = biomeWrapper.biome;
+		if (biome == null) // We are looking at the empty biome wrapper
 		{
-			unwrappedBiome = unwrap(biomeWrapper.biome);
-		}
-		
-		if(unwrappedBiome == null)
-		{
-			// we are looking at the empty biome wrapper, try using plains as a backup
 			BiomeWrapper plainsBiomeWrapper = ((BiomeWrapper) clientLevelWrapper.getPlainsBiomeWrapper());
 			if (plainsBiomeWrapper != null)
 			{
-				unwrappedBiome = unwrap(plainsBiomeWrapper.biome);
+				biome = plainsBiomeWrapper.biome;
 			}
 		}
 		
-		this.biome = unwrappedBiome;
+		this.biome = biome;
 	}
 	
 	
 	
 	@Override
-	public int getBlockTint(@NotNull BlockPos blockPos, @NotNull ColorResolver colorResolver) 
-	{ 
-		if (this.biome != null)
-		{
-			return colorResolver.getColor(this.biome, blockPos.getX(), blockPos.getZ());
-		}
-		else
+	public int getBlockTint(@NotNull BlockPos blockPos, @NotNull ColorResolver colorResolver)
+	{
+		if (this.biome == null)
 		{
 			// hopefully unneeded debug color
 			return ColorUtil.CYAN;
 		}
+		return colorResolver.getColor(unwrap(biome), blockPos.getX(), blockPos.getZ());
 	}
 	
 	private static Biome unwrap(#if MC_VER >= MC_1_18_2 Holder<Biome> #else Biome #endif biome)

common/src/main/java/com/seibel/distanthorizons/common/wrappers/chunk/ChunkWrapper.java

@@ -278,14 +278,14 @@ public class ChunkWrapper implements IChunkWrapper
 					{
 						// is this block solid?
 						if (solidHeight == minInclusiveBuildHeight
-								&& block.isSolid())
+							&& block.isSolid())
 						{
 							solidHeight = y;
 						}
 						
 						// is this block light blocking?
 						if (lightBlockingHeight == minInclusiveBuildHeight
-								&& block.getOpacity() != LodUtil.BLOCK_FULLY_TRANSPARENT)
+							&& block.getOpacity() != LodUtil.BLOCK_FULLY_TRANSPARENT)
 						{
 							lightBlockingHeight = y;
 						}

common/src/main/java/com/seibel/distanthorizons/common/wrappers/minecraft/MinecraftClientWrapper.java

@@ -214,17 +214,29 @@ public class MinecraftClientWrapper implements IMinecraftClientWrapper, IMinecra
 	@Override
 	public DhBlockPos getPlayerBlockPos()
 	{
-		BlockPos playerPos = this.getPlayer().blockPosition();
+		LocalPlayer player = this.getPlayer();
+		if (player == null)
+		{
+			return new DhBlockPos(0, 0, 0);	
+		}
+		
+		BlockPos playerPos = player.blockPosition();
 		return new DhBlockPos(playerPos.getX(), playerPos.getY(), playerPos.getZ());
 	}
 	
 	@Override
 	public DhChunkPos getPlayerChunkPos()
 	{
+		LocalPlayer player = this.getPlayer();
+		if (player == null)
+		{
+			return new DhChunkPos(0, 0);
+		}
+		
         #if MC_VER < MC_1_17_1
-        ChunkPos playerPos = new ChunkPos(this.getPlayer().blockPosition());
+        ChunkPos playerPos = new ChunkPos(player.blockPosition());
         #else
-		ChunkPos playerPos = this.getPlayer().chunkPosition();
+		ChunkPos playerPos = player.chunkPosition();
         #endif
 		return new DhChunkPos(playerPos.x, playerPos.z);
 	}

common/src/main/java/com/seibel/distanthorizons/common/wrappers/minecraft/MinecraftGLWrapper.java

@@ -19,7 +19,11 @@
 
 package com.seibel.distanthorizons.common.wrappers.minecraft;
 
+#if MC_VER < MC_1_21_5
 import com.mojang.blaze3d.platform.GlStateManager;
+#elif MC_VER == MC_1_21_5
+import com.mojang.blaze3d.opengl.GlStateManager;
+#endif
 
 import com.seibel.distanthorizons.core.logging.DhLoggerBuilder;
 import com.seibel.distanthorizons.core.wrapperInterfaces.minecraft.IMinecraftGLWrapper;
@@ -148,7 +152,10 @@ public class MinecraftGLWrapper implements IMinecraftGLWrapper
 	public void glBlendFunc(int sfactor, int dfactor) 
 	{
 		GL32.glBlendFunc(sfactor, dfactor);
-		GlStateManager._blendFunc(sfactor, dfactor); 
+		
+		#if MC_VER < MC_1_21_5
+		GlStateManager._blendFunc(sfactor, dfactor);
+		#endif
 	}
 	/** @see GL32#glBlendFuncSeparate */
 	@Override
@@ -180,7 +187,15 @@ public class MinecraftGLWrapper implements IMinecraftGLWrapper
 	/** @see GL32#glDeleteBuffers(int)  */
 	@Override
 	public void glDeleteBuffers(int buffer)
-	{ GlStateManager._glDeleteBuffers(buffer); }
+	{
+		GL32.glDeleteBuffers(buffer);
+		
+		// MC's implementation has a bug where it will throw:
+		// GL_INVALID_OPERATION in glBufferData(immutable)
+		// when attempting to delete Storage Buffers
+		// So we need to manually delete the buffers ourselves
+		//GlStateManager._glDeleteBuffers(buffer); 
+	}
 	
 	
 	// culling //

common/src/main/java/com/seibel/distanthorizons/common/wrappers/minecraft/MinecraftRenderWrapper.java

@@ -71,6 +71,10 @@ import net.minecraft.world.phys.Vec3;
 import org.apache.logging.log4j.Logger;
 import org.joml.Vector4f;
 
+#if MC_VER >= MC_1_21_5
+import com.mojang.blaze3d.opengl.GlTexture;
+import org.lwjgl.opengl.GL32;
+#endif
 
 /**
  * A singleton that contains everything
@@ -102,8 +106,15 @@ public class MinecraftRenderWrapper implements IMinecraftRenderWrapper
 	 */
 	public int finalLevelFrameBufferId = -1;
 	
+	public boolean colorTextureCastFailLogged = false;
+	public boolean depthTextureCastFailLogged = false;
 	
 	
+	
+	//=========//
+	// methods //
+	//=========//
+	
 	@Override
 	public Vec3f getLookAtVector()
 	{
@@ -250,6 +261,26 @@ public class MinecraftRenderWrapper implements IMinecraftRenderWrapper
 	
 	private RenderTarget getRenderTarget() { return MC.getMainRenderTarget(); }
 	
+	@Override
+	public boolean mcRendersToFrameBuffer()
+	{
+		#if MC_VER < MC_1_21_5
+		return true;
+		#else
+		return false;
+		#endif
+	}
+	
+	@Override
+	public boolean runningLegacyOpenGL()
+	{
+		#if MC_VER <= MC_1_16_5
+		return true;
+		#else
+		return false;
+		#endif
+	}
+	
 	@Override
 	public int getTargetFrameBuffer()
 	{
@@ -259,27 +290,87 @@ public class MinecraftRenderWrapper implements IMinecraftRenderWrapper
 			return this.finalLevelFrameBufferId;
 		}
 		
+		#if MC_VER < MC_1_21_5
 		return this.getRenderTarget().frameBufferId;
+		#else
+		// MC renders to a texture and then directly to the default FBO now
+		// we need to draw to their texture instead of the FBO
+		return 0; // 0 is the ID for the default frame buffer
+		#endif
 	}
 	
 	@Override
 	public void clearTargetFrameBuffer() { this.finalLevelFrameBufferId = -1; }
 	
 	@Override
-	public int getDepthTextureId() { return this.getRenderTarget().getDepthTextureId(); }
+	public int getDepthTextureId()
+	{
+		#if MC_VER < MC_1_21_5
+		return this.getRenderTarget().getDepthTextureId();
+		#else
+		try
+		{
+			GlTexture glTexture = (GlTexture) this.getRenderTarget().getDepthTexture();
+			if (glTexture == null)
+			{
+				// shouldn't happen, but just in case
+				return 0;
+			}
+			
+			return glTexture.glId();
+		}
+		catch (ClassCastException e)
+		{
+			// only log this error once per session
+			if (!this.depthTextureCastFailLogged)
+			{
+				this.depthTextureCastFailLogged = true;
+				LOGGER.error("Unable to cast render Target depth texture to GlTexture. MC or a rendering mod may have changed the object type.", e);
+			}
+			return 0;
+		}
+		#endif
+	}
 	@Override
-	public int getColorTextureId() { return this.getRenderTarget().getColorTextureId(); }
+	public int getColorTextureId() 
+	{
+		#if MC_VER < MC_1_21_5
+		return this.getRenderTarget().getColorTextureId();
+		#else
+		try
+		{
+			GlTexture glTexture = (GlTexture) this.getRenderTarget().getColorTexture();
+			if (glTexture == null)
+			{
+				// shouldn't happen, but just in case
+				return 0;
+			}
+			
+			return glTexture.glId();
+		}
+		catch (ClassCastException e)
+		{
+			// only log this error once per session
+			if (!this.colorTextureCastFailLogged)
+			{
+				this.colorTextureCastFailLogged = true;
+				LOGGER.error("Unable to cast render Target color texture to GlTexture. MC or a rendering mod may have changed the object type.", e);
+			}
+			return 0;
+		}
+		#endif
+	}
 	
 	@Override
 	public int getTargetFrameBufferViewportWidth()
 	{
-		return getRenderTarget().viewWidth;
+		return this.getRenderTarget().viewWidth;
 	}
 	
 	@Override
 	public int getTargetFrameBufferViewportHeight()
 	{
-		return getRenderTarget().viewHeight;
+		return this.getRenderTarget().viewHeight;
 	}
 	
 	@Override

common/src/main/java/com/seibel/distanthorizons/common/wrappers/misc/LightMapWrapper.java

@@ -21,8 +21,10 @@ package com.seibel.distanthorizons.common.wrappers.misc;
 
 import com.mojang.blaze3d.platform.NativeImage;
 import com.seibel.distanthorizons.core.dependencyInjection.SingletonInjector;
+import com.seibel.distanthorizons.core.logging.DhLoggerBuilder;
 import com.seibel.distanthorizons.core.wrapperInterfaces.minecraft.IMinecraftGLWrapper;
 import com.seibel.distanthorizons.core.wrapperInterfaces.misc.ILightMapWrapper;
+import org.apache.logging.log4j.Logger;
 import org.lwjgl.opengl.GL32;
 
 import java.nio.ByteBuffer;
@@ -30,6 +32,7 @@ import java.nio.ByteBuffer;
 public class LightMapWrapper implements ILightMapWrapper
 {
 	private static final IMinecraftGLWrapper GLMC = SingletonInjector.INSTANCE.get(IMinecraftGLWrapper.class);
+	private static final Logger LOGGER = DhLoggerBuilder.getLogger();
 	
 	private int textureId = 0;
 	
@@ -49,6 +52,7 @@ public class LightMapWrapper implements ILightMapWrapper
 	
 	public void uploadLightmap(NativeImage image)
 	{
+		#if MC_VER < MC_1_21_5
 		int currentTexture = GLMC.getActiveTexture();
 		if (this.textureId == 0)
 		{
@@ -59,14 +63,27 @@ public class LightMapWrapper implements ILightMapWrapper
 			GLMC.glBindTexture(this.textureId);
 		}
 		image.upload(0, 0, 0, false);
-		GLMC.glBindTexture(currentTexture);
+		
+		// getActiveTexture() may return textures that aren't valid and attempting to bind them will
+		// throw a GL error in MC 1.21.1
+		if (GL32.glIsTexture(currentTexture))
+		{
+			GLMC.glBindTexture(currentTexture);
+		}
+		#else 
+		throw new UnsupportedOperationException("setLightmapId should be used for MC versions after 1.21.5"); // TODO that MC version number is wrong, when did we actually start using setLightmapId()?
+		#endif
 	}
 	private void createLightmap(NativeImage image)
 	{
+		#if MC_VER < MC_1_21_5
 		this.textureId = GLMC.glGenTextures();
 		GLMC.glBindTexture(this.textureId);
 		GL32.glTexImage2D(GL32.GL_TEXTURE_2D, 0, image.format().glFormat(), image.getWidth(), image.getHeight(),
 				0, image.format().glFormat(), GL32.GL_UNSIGNED_BYTE, (ByteBuffer) null);
+		#else
+		throw new UnsupportedOperationException("setLightmapId should be used for MC versions after 1.21.5"); // TODO that MC version number is wrong, when did we actually start using setLightmapId()?
+		#endif
 	}
 	
 	public void setLightmapId(int minecraftLightmapTetxureId)

common/src/main/java/com/seibel/distanthorizons/common/wrappers/world/ClientLevelWrapper.java

@@ -25,7 +25,6 @@ import net.minecraft.server.level.ServerLevel;
 import net.minecraft.world.level.block.state.BlockState;
 import net.minecraft.world.level.chunk.ChunkAccess;
 import net.minecraft.world.level.chunk.ChunkSource;
-import net.minecraft.world.phys.Vec3;
 import org.apache.logging.log4j.Logger;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
@@ -33,6 +32,10 @@ import org.jetbrains.annotations.Nullable;
 import java.awt.*;
 import java.io.File;
 import java.io.IOException;
+import java.lang.ref.WeakReference;
+import java.util.Collections;
+import java.util.Map;
+import java.util.WeakHashMap;
 import java.util.concurrent.ConcurrentHashMap;
 
 #if MC_VER <= MC_1_20_4
@@ -42,6 +45,7 @@ import net.minecraft.world.level.chunk.status.ChunkStatus;
 #endif
 
 #if MC_VER < MC_1_21_3
+import net.minecraft.world.phys.Vec3;
 #else
 import com.seibel.distanthorizons.core.util.ColorUtil;
 #endif
@@ -49,7 +53,12 @@ import com.seibel.distanthorizons.core.util.ColorUtil;
 public class ClientLevelWrapper implements IClientLevelWrapper
 {
 	private static final Logger LOGGER = DhLoggerBuilder.getLogger(ClientLevelWrapper.class.getSimpleName());
-	private static final ConcurrentHashMap<ClientLevel, ClientLevelWrapper> LEVEL_WRAPPER_BY_CLIENT_LEVEL = new ConcurrentHashMap<>(); // TODO can leak
+	/**
+	 * weak references are to prevent rare issues
+	 * where, upon world closure, some levels aren't shutdown/removed properly
+	 * and/or for servers were the level object isn't consistent
+	 */
+	private static final Map<ClientLevel, WeakReference<ClientLevelWrapper>> LEVEL_WRAPPER_REF_BY_CLIENT_LEVEL = Collections.synchronizedMap(new WeakHashMap<>());
 	private static final IKeyedClientLevelManager KEYED_CLIENT_LEVEL_MANAGER = SingletonInjector.INSTANCE.get(IKeyedClientLevelManager.class);
 	
 	private static final Minecraft MINECRAFT = Minecraft.getInstance();
@@ -72,9 +81,9 @@ public class ClientLevelWrapper implements IClientLevelWrapper
 	
 	
 	
-	//===============//
-	// wrapper logic //
-	//===============//
+	//==================//
+	// instance methods //
+	//==================//
 	
 	public static IClientLevelWrapper getWrapper(@NotNull ClientLevel level) { return getWrapper(level, false); }
 	
@@ -96,7 +105,19 @@ public class ClientLevelWrapper implements IClientLevelWrapper
 			}
 		}
 		
-		return LEVEL_WRAPPER_BY_CLIENT_LEVEL.computeIfAbsent(level, ClientLevelWrapper::new);
+		return LEVEL_WRAPPER_REF_BY_CLIENT_LEVEL.compute(level, (newLevel, levelRef) ->
+		{
+			if (levelRef != null)
+			{
+				ClientLevelWrapper oldLevelWrapper = levelRef.get();
+				if (oldLevelWrapper != null)
+				{
+					return levelRef;
+				}
+			}
+			
+			return new WeakReference<>(new ClientLevelWrapper(newLevel));
+		}).get();
 	}
 	
 	@Nullable
@@ -265,7 +286,7 @@ public class ClientLevelWrapper implements IClientLevelWrapper
 	@Override
 	public void onUnload() 
 	{ 
-		LEVEL_WRAPPER_BY_CLIENT_LEVEL.remove(this.level);
+		LEVEL_WRAPPER_REF_BY_CLIENT_LEVEL.remove(this.level);
 		this.parentDhLevel = null;
 	}
 	

common/src/main/java/com/seibel/distanthorizons/common/wrappers/world/DimensionTypeWrapper.java

@@ -28,72 +28,80 @@ import net.minecraft.world.level.dimension.DimensionType;
 
 /**
  * @author James Seibel
- * @version 2022-9-16
  */
 public class DimensionTypeWrapper implements IDimensionTypeWrapper
 {
-	private static final ConcurrentMap<DimensionType, DimensionTypeWrapper> dimensionTypeWrapperMap = new ConcurrentHashMap<>();
+	private static final ConcurrentMap<String, DimensionTypeWrapper> DIMENSION_WRAPPER_BY_NAME = new ConcurrentHashMap<>();
 	private final DimensionType dimensionType;
 	
-	public DimensionTypeWrapper(DimensionType dimensionType)
-	{
-		this.dimensionType = dimensionType;
-	}
+	
+	
+	//=============//
+	// Constructor //
+	//=============//
+	
+	public DimensionTypeWrapper(DimensionType dimensionType) { this.dimensionType = dimensionType; }
 	
 	public static DimensionTypeWrapper getDimensionTypeWrapper(DimensionType dimensionType)
 	{
-		//first we check if the biome has already been wrapped
-		if (dimensionTypeWrapperMap.containsKey(dimensionType) && dimensionTypeWrapperMap.get(dimensionType) != null)
+		String dimName = getName(dimensionType);
+		
+		// check if the dimension has already been wrapped
+		if (DIMENSION_WRAPPER_BY_NAME.containsKey(dimName) 
+			&& DIMENSION_WRAPPER_BY_NAME.get(dimName) != null)
 		{
-			return dimensionTypeWrapperMap.get(dimensionType);
+			return DIMENSION_WRAPPER_BY_NAME.get(dimName);
 		}
 		
 		
-		//if it hasn't been created yet, we create it and save it in the map
+		// create the missing wrapper
 		DimensionTypeWrapper dimensionTypeWrapper = new DimensionTypeWrapper(dimensionType);
-		dimensionTypeWrapperMap.put(dimensionType, dimensionTypeWrapper);
-		
-		//we return the newly created wrapper
+		DIMENSION_WRAPPER_BY_NAME.put(dimName, dimensionTypeWrapper);
 		return dimensionTypeWrapper;
 	}
 	
-	public static void clearMap()
-	{
-		dimensionTypeWrapperMap.clear();
-	}
+	public static void clearMap() { DIMENSION_WRAPPER_BY_NAME.clear(); }
 	
 	
-	private String getDimensionName()
+	
+	//=================//
+	// wrapper methods //
+	//=================//
+	
+	@Override
+	public String getName() { return getName(this.dimensionType); }
+	public static String getName(DimensionType dimensionType)
 	{
 		#if MC_VER <= MC_1_16_5
 		// effectsLocation() is marked as client only, so using the backing field directly
 		return dimensionType.effectsLocation.getPath();
 		#else
-		return this.dimensionType.effectsLocation().getPath();
+		return dimensionType.effectsLocation().getPath();
 		#endif
 	}
 	
 	@Override
-	public boolean hasCeiling()
-	{
-		return this.dimensionType.hasCeiling();
-	}
+	public boolean hasCeiling() { return this.dimensionType.hasCeiling(); }
 	
 	@Override
-	public boolean hasSkyLight()
-	{
-		return this.dimensionType.hasSkyLight();
-	}
+	public boolean hasSkyLight() { return this.dimensionType.hasSkyLight(); }
 	
 	@Override
-	public Object getWrappedMcObject()
-	{
-		return this.dimensionType;
-	}
+	public Object getWrappedMcObject() { return this.dimensionType; }
 	
 	// there's definitely a better way of doing this, but it should work well enough for now
 	@Override
-	public boolean isTheEnd() { return this.getDimensionName().equalsIgnoreCase("the_end"); }
+	public boolean isTheEnd() { return this.getName().equalsIgnoreCase("the_end"); }
+	
+	@Override
+	public double getCoordinateScale() { return this.dimensionType.coordinateScale(); }
+	
+	
+	
+	
+	//================//
+	// base overrides //
+	//================//
 	
 	@Override
 	public boolean equals(Object obj)
@@ -105,9 +113,10 @@ public class DimensionTypeWrapper implements IDimensionTypeWrapper
 		else
 		{
 			DimensionTypeWrapper other = (DimensionTypeWrapper) obj;
-			return other.getDimensionName().equals(this.getDimensionName());
+			return other.getName().equals(this.getName());
 		}
 	}
 	
 	
+	
 }

common/src/main/java/com/seibel/distanthorizons/common/wrappers/world/ServerLevelWrapper.java

@@ -20,6 +20,10 @@
 package com.seibel.distanthorizons.common.wrappers.world;
 
 import java.io.File;
+import java.lang.ref.WeakReference;
+import java.util.Collections;
+import java.util.Map;
+import java.util.WeakHashMap;
 import java.util.concurrent.ConcurrentHashMap;
 
 import com.seibel.distanthorizons.api.enums.worldGeneration.EDhApiLevelType;
@@ -38,6 +42,7 @@ import com.seibel.distanthorizons.core.wrapperInterfaces.world.IBiomeWrapper;
 
 import com.seibel.distanthorizons.core.wrapperInterfaces.world.IServerLevelWrapper;
 import net.minecraft.server.level.ServerLevel;
+import net.minecraft.world.level.Level;
 import net.minecraft.world.level.chunk.ChunkAccess;
 import net.minecraft.world.level.chunk.ChunkSource;
 
@@ -57,7 +62,11 @@ import org.apache.logging.log4j.Logger;
 public class ServerLevelWrapper implements IServerLevelWrapper
 {
 	private static final Logger LOGGER = DhLoggerBuilder.getLogger();
-	private static final ConcurrentHashMap<ServerLevel, ServerLevelWrapper> LEVEL_WRAPPER_BY_SERVER_LEVEL = new ConcurrentHashMap<>();
+	/** 
+	 * weak references are to prevent rare issues
+	 * where, upon world closure, some levels aren't shutdown/removed properly
+	 */
+	private static final Map<ServerLevel, WeakReference<ServerLevelWrapper>> LEVEL_WRAPPER_REF_BY_SERVER_LEVEL = Collections.synchronizedMap(new WeakHashMap<>());
 	
 	private final ServerLevel level;
 	@Deprecated // TODO circular references are bad
@@ -70,15 +79,29 @@ public class ServerLevelWrapper implements IServerLevelWrapper
 	//==============//
 	
 	public static ServerLevelWrapper getWrapper(ServerLevel level) 
-	{ return LEVEL_WRAPPER_BY_SERVER_LEVEL.computeIfAbsent(level, ServerLevelWrapper::new); }
+	{
+		return LEVEL_WRAPPER_REF_BY_SERVER_LEVEL.compute(level, (newLevel, levelRef) ->
+		{
+			if (levelRef != null)
+			{
+				ServerLevelWrapper oldLevelWrapper = levelRef.get();
+				if (oldLevelWrapper != null)
+				{
+					return levelRef;
+				}
+			}
+			
+			return new WeakReference<>(new ServerLevelWrapper(newLevel));
+		}).get();
+	}
 	
 	public ServerLevelWrapper(ServerLevel level) { this.level = level; }
 	
 	
 	
-	//=========//
-	// methods //
-	//=========//
+	//==================//
+	// instance methods //
+	//==================//
 	
 	@Override
 	public File getMcSaveFolder() 
@@ -93,10 +116,12 @@ public class ServerLevelWrapper implements IServerLevelWrapper
 	@Override
 	public String getWorldFolderName()
 	{
-		#if MC_VER >= MC_1_17_1
-		return this.level.getServer().getWorldScreenshotFile().get().getParent().getFileName().toString();
-		#else // <= 1.16.5
-		return this.level.getServer().getWorldScreenshotFile().getParentFile().getName();
+		// Need specifically overworld since it's the only dimension that is stored in a server root folder
+		
+		#if MC_VER >= MC_1_21_3
+		return this.level.getServer().getLevel(Level.OVERWORLD).getChunkSource().getDataStorage().dataFolder.getParent().getFileName().toString();
+		#else // <= 1.21.3
+		return this.level.getServer().getLevel(Level.OVERWORLD).getChunkSource().getDataStorage().dataFolder.getParentFile().getName();
 		#endif
 	}
 	
@@ -179,7 +204,7 @@ public class ServerLevelWrapper implements IServerLevelWrapper
 	public ServerLevel getWrappedMcObject() { return this.level; }
 	
 	@Override
-	public void onUnload() { LEVEL_WRAPPER_BY_SERVER_LEVEL.remove(this.level); }
+	public void onUnload() { LEVEL_WRAPPER_REF_BY_SERVER_LEVEL.remove(this.level); }
 	
 	
 	@Override

common/src/main/java/com/seibel/distanthorizons/common/wrappers/worldGeneration/BatchGenerationEnvironment.java

@@ -113,7 +113,11 @@ public final class BatchGenerationEnvironment extends AbstractBatchGenerationEnv
 			new ConfigBasedLogger(LogManager.getLogger("LodWorldGen"),
 					() -> Config.Common.Logging.logWorldGenLoadEvent.get());
 	
+	#if MC_VER < MC_1_21_5
 	private static final TicketType<ChunkPos> DH_SERVER_GEN_TICKET = TicketType.create("dh_server_gen_ticket", Comparator.comparingLong(ChunkPos::toLong));
+	#else
+	private static final TicketType DH_SERVER_GEN_TICKET = new TicketType(/* timeout, 0 = disabled*/0L, /* persist */ false, TicketType.TicketUse.LOADING);
+	#endif
 	
 	private static final IModChecker MOD_CHECKER = SingletonInjector.INSTANCE.get(IModChecker.class);
 	
@@ -125,7 +129,7 @@ public final class BatchGenerationEnvironment extends AbstractBatchGenerationEnv
 	 * pull chunks using their async method), or if there
 	 * was an issue with the sync pulling method.
 	 */
-	private boolean pullExistingChunkAsync = false;
+	private boolean pullExistingChunkUsingMcAsyncMethod = false;
 	
 	
 	
@@ -241,19 +245,10 @@ public final class BatchGenerationEnvironment extends AbstractBatchGenerationEnv
 		
 		if (MOD_CHECKER.isModLoaded("c2me"))
 		{
-			EVENT_LOGGER.info("C2ME detected: DH's pre-existing chunk accessing will use async methods handled by C2ME.");
-			this.pullExistingChunkAsync = true;
+			EVENT_LOGGER.info("C2ME detected: DH's pre-existing chunk accessing will use methods handled by C2ME.");
+			this.pullExistingChunkUsingMcAsyncMethod = true;
 		}
 		
-		//IOWorker ioWorker = level.getChunkSource().chunkMap.worker;
-		//	
-		//	#if MC_VER <= MC_1_18_2
-		//	return CompletableFuture.completedFuture(ioWorker.load(chunkPos));
-		//	#else
-		//
-		//// storage will be null if C2ME is installed
-		//if (ioWorker.storage != null)
-		
 		this.params = new GlobalParameters(serverlevel);
 	}
 	
@@ -342,6 +337,8 @@ public final class BatchGenerationEnvironment extends AbstractBatchGenerationEnv
 	// world generation //
 	//==================//
 	
+	// TODO this is already being run on a generator thread,
+	//  why are we passing in an executor?
 	/** @throws RejectedExecutionException if the given {@link Executor} is cancelled. */
 	public CompletableFuture<Void> generateLodFromListAsync(GenerationEvent genEvent, Executor executor) throws RejectedExecutionException, InterruptedException
 	{
@@ -385,10 +382,12 @@ public final class BatchGenerationEnvironment extends AbstractBatchGenerationEnv
 				.map((chunkPos) -> this.createEmptyOrPreExistingChunkAsync(chunkPos.x, chunkPos.z, chunkSkyLightingByDhPos, chunkBlockLightingByDhPos, generatedChunkByDhPos))
 				.toArray(CompletableFuture[]::new);
 		
+		// join to prevent an issue where DH queues too many tasks or something(?)
+		// also allows file IO to run in parallel so no one thread is waiting on disk IO (this is only an issue when C2ME is present)
+		CompletableFuture.allOf(readFutures).join();
 		
 		// future chain for generation
-		return CompletableFuture.allOf(readFutures)
-			.thenRunAsync(() -> 
+		return CompletableFuture.runAsync(() -> 
 			{
 				// offset 1 chunk in both X and Z direction so we can generate an even number of chunks wide
 				// while still submitting an odd number width to MC's internal generators
@@ -424,7 +423,8 @@ public final class BatchGenerationEnvironment extends AbstractBatchGenerationEnv
 						
 						ChunkAccess centerChunk = regionChunks.stream()
 								.filter((chunk) -> chunk.getPos().x == centerX && chunk.getPos().z == centerZ)
-								.findFirst().get();
+								.findFirst()
+								.orElseGet(() -> regionChunks.getFirst());
 						
 						genEvent.refreshTimeout();
 						DhLitWorldGenRegion region = new DhLitWorldGenRegion(
@@ -591,6 +591,7 @@ public final class BatchGenerationEnvironment extends AbstractBatchGenerationEnv
 				return newChunk;
 			});
 	}
+	// TODO FIXME this method can be called up to 25 times for the same chunk position, why?
 	private CompletableFuture<CompoundTag> getChunkNbtDataAsync(ChunkPos chunkPos)
 	{
 		ServerLevel level = this.params.level;
@@ -609,7 +610,7 @@ public final class BatchGenerationEnvironment extends AbstractBatchGenerationEnv
 			#else
 			
 			// storage will be null if C2ME is installed
-			if (!this.pullExistingChunkAsync && ioWorker.storage != null)
+			if (!this.pullExistingChunkUsingMcAsyncMethod && ioWorker.storage != null)
 			{
 				try
 				{
@@ -623,7 +624,7 @@ public final class BatchGenerationEnvironment extends AbstractBatchGenerationEnv
 					// ioWorker.storage
 					// but just in case
 					EVENT_LOGGER.error("Unexpected issue pulling pre-existing chunk ["+chunkPos+"], falling back to async chunk pulling. This may cause server-tick lag.", e);
-					this.pullExistingChunkAsync = true;
+					this.pullExistingChunkUsingMcAsyncMethod = true;
 					
 					// try again now using the async method
 					return this.getChunkNbtDataAsync(chunkPos);
@@ -632,32 +633,42 @@ public final class BatchGenerationEnvironment extends AbstractBatchGenerationEnv
 			else
 			{
 				// log if we unexpectedly weren't able to run the sync chunk pulling
-				if (!this.pullExistingChunkAsync)
+				if (!this.pullExistingChunkUsingMcAsyncMethod)
 				{
 					// this shouldn't happen, but just in case
 					EVENT_LOGGER.info("Unable to pull pre-existing chunk using synchronous method. Falling back to async method. this may cause server-tick lag.");
-					this.pullExistingChunkAsync = true;
+					this.pullExistingChunkUsingMcAsyncMethod = true;
 				}
 				
+				//GET_CHUNK_COUNT_REF.incrementAndGet();
 				
 				// When running in vanilla MC on versions before 1.21.4,  
 				// DH would attempt to run loadAsync on this same thread via a threading mixin,
 				// to prevent causing lag on the server thread.
 				// However, if a mod like C2ME is installed this will run on a C2ME thread instead.
 				return ioWorker.loadAsync(chunkPos)
-					.thenApply(optional -> optional.orElse(null))
-					.exceptionally((throwable) ->
-					{
-						// unwrap the CompletionException if necessary
-						Throwable actualThrowable = throwable;
-						while (actualThrowable instanceof CompletionException completionException)
+						.thenApply(optional ->
 						{
-							actualThrowable = completionException.getCause();
-						}
-						
-						LOAD_LOGGER.warn("DistantHorizons: Couldn't load or make chunk ["+chunkPos+"], error: ["+actualThrowable.getMessage()+"].", actualThrowable);
-						return null;
-					});
+							// Debugging note:
+							// If there are reports of extreme memory use when C2ME is installed, that probably means
+							// this method is queuing a lot of tasks (1,000+), which causes C2ME to explode.
+							
+							//GET_CHUNK_COUNT_REF.decrementAndGet();
+							//PREF_LOGGER.info("chunk getter count ["+F3Screen.NUMBER_FORMAT.format(GET_CHUNK_COUNT_REF.get())+"]");
+							return optional.orElse(null);
+						})
+						.exceptionally((throwable) ->
+						{
+							// unwrap the CompletionException if necessary
+							Throwable actualThrowable = throwable;
+							while (actualThrowable instanceof CompletionException completionException)
+							{
+								actualThrowable = completionException.getCause();
+							}
+							
+							LOAD_LOGGER.warn("DistantHorizons: Couldn't load or make chunk ["+chunkPos+"], error: ["+actualThrowable.getMessage()+"].", actualThrowable);
+							return null;
+						});
 			}
 			#endif
 		}
@@ -871,7 +882,11 @@ public final class BatchGenerationEnvironment extends AbstractBatchGenerationEnv
 			chunkLevel = generateUpToFeatures ? ChunkLevel.byStatus(ChunkStatus.FEATURES) : 33;
 			#endif
 			
+			#if MC_VER < MC_1_21_5
 			level.getChunkSource().distanceManager.addTicket(DH_SERVER_GEN_TICKET, pos, chunkLevel, pos);
+			#else
+			level.getChunkSource().addTicketWithRadius(DH_SERVER_GEN_TICKET, pos, 0);
+			#endif
 			level.getChunkSource().distanceManager.runAllUpdates(level.getChunkSource().chunkMap); // probably not the most optimal to run updates here, but fast enough
 			ChunkHolder holder = level.getChunkSource().chunkMap.getUpdatingChunkIfPresent(pos.toLong());
 			if (holder == null)
@@ -908,7 +923,11 @@ public final class BatchGenerationEnvironment extends AbstractBatchGenerationEnv
 				chunkLevel = chunkWasGeneratedUpToFeatures ? ChunkLevel.byStatus(ChunkStatus.FEATURES) : 33;
 				#endif
 				
+				#if MC_VER < MC_1_21_5
 				level.getChunkSource().distanceManager.removeTicket(DH_SERVER_GEN_TICKET, pos, chunkLevel, pos);
+				#else
+				level.getChunkSource().removeTicketWithRadius(DH_SERVER_GEN_TICKET, pos, 0);
+				#endif
 				
 				// mitigate OOM issues in vanilla chunk system: see https://github.com/pop4959/Chunky/pull/383
 				level.getChunkSource().chunkMap.tick(() -> false);

common/src/main/java/com/seibel/distanthorizons/common/wrappers/worldGeneration/mimicObject/ChunkLoader.java

@@ -29,6 +29,9 @@ import com.seibel.distanthorizons.core.util.LodUtil;
 import com.seibel.distanthorizons.core.wrapperInterfaces.chunk.ChunkLightStorage;
 
 import java.util.Objects;
+import java.util.Optional;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.atomic.AtomicBoolean;
 
 
 import it.unimi.dsi.fastutil.shorts.ShortList;
@@ -83,11 +86,13 @@ import net.minecraft.world.level.chunk.status.ChunkType;
 #endif
 
 import net.minecraft.world.level.material.Fluid;
+import org.jetbrains.annotations.Nullable;
 
 
 public class ChunkLoader
 {
-	private static boolean zeroChunkPosErrorLogged = false;
+	private static final AtomicBoolean ZERO_CHUNK_POS_ERROR_LOGGED_REF = new AtomicBoolean(false);
+	
 	
 	#if MC_VER >= MC_1_19_2
 	private static final Codec<PalettedContainer<BlockState>> BLOCK_STATE_CODEC = PalettedContainer.codecRW(Block.BLOCK_STATE_REGISTRY, BlockState.CODEC, PalettedContainer.Strategy.SECTION_STATES, Blocks.AIR.defaultBlockState());
@@ -103,6 +108,8 @@ public class ChunkLoader
 	
 	private static boolean lightingSectionErrorLogged = false;
 	
+	private static final ConcurrentHashMap<String, Object> LOGGED_ERROR_MESSAGE_MAP = new ConcurrentHashMap<>();
+	
 	
 	
 	//============//
@@ -117,19 +124,16 @@ public class ChunkLoader
 		CompoundTag tagLevel = chunkData;
 		#endif
 		
-		ChunkPos actualPos = new ChunkPos(tagLevel.getInt("xPos"), tagLevel.getInt("zPos"));
+		int chunkX = tagGetInt(tagLevel,"xPos");
+		int chunkZ = tagGetInt(tagLevel, "zPos");
+		ChunkPos actualPos = new ChunkPos(chunkX, chunkZ);
+		
 		if (!Objects.equals(chunkPos, actualPos))
 		{
-			#if MC_VER >= MC_1_18_2
-			if (actualPos.equals(ChunkPos.ZERO))
-			#else
-			if (actualPos.equals(ChunkPos.INVALID_CHUNK_POS))
-			#endif
+			if (chunkX == 0 && chunkZ == 0)
 			{
-				if (!zeroChunkPosErrorLogged)
+				if (!ZERO_CHUNK_POS_ERROR_LOGGED_REF.getAndSet(true))
 				{
-					zeroChunkPosErrorLogged = true;
-					
 					// explicit chunkPos toString is necessary otherwise the JDK 17 compiler breaks
 					LOGGER.warn("Chunk file at ["+chunkPos.toString()+"] doesn't have a chunk pos. \n" +
 						"This might happen if the world was created using an external program. \n" +
@@ -171,14 +175,27 @@ public class ChunkLoader
 		
 		#endif
 		
-		long inhabitedTime = tagLevel.getLong("InhabitedTime");
+		long inhabitedTime = tagGetLong(tagLevel, "InhabitedTime");
 		
 		//================== Read params for making the LevelChunk ==================
-		UpgradeData upgradeData = tagLevel.contains(TAG_UPGRADE_DATA, 10)
-				? new UpgradeData(tagLevel.getCompound(TAG_UPGRADE_DATA)#if MC_VER >= MC_1_17_1 , level #endif )
-				: UpgradeData.EMPTY;
 		
-		boolean isLightOn = tagLevel.getBoolean("isLightOn");
+		UpgradeData upgradeData;
+		#if MC_VER < MC_1_17_1
+		upgradeData = tagLevel.contains(TAG_UPGRADE_DATA, 10)
+				? new UpgradeData(tagGetCompoundTag(tagLevel, TAG_UPGRADE_DATA))
+				: UpgradeData.EMPTY;
+		#elif MC_VER < MC_1_21_5
+		upgradeData = tagLevel.contains(TAG_UPGRADE_DATA, 10)
+				? new UpgradeData(tagGetCompoundTag(tagLevel, TAG_UPGRADE_DATA), level)
+				: UpgradeData.EMPTY;
+		#else
+		upgradeData = tagLevel.contains(TAG_UPGRADE_DATA)
+				? new UpgradeData(tagGetCompoundTag(tagLevel, TAG_UPGRADE_DATA), level)
+				: UpgradeData.EMPTY;
+		#endif
+		
+		
+		boolean isLightOn = tagGetBoolean(tagLevel, "isLightOn");
 		#if MC_VER < MC_1_18_2
 		ChunkBiomeContainer chunkBiomeContainer = new ChunkBiomeContainer(
 				level.getLevel().registryAccess().registryOrThrow(Registry.BIOME_REGISTRY)#if MC_VER >= MC_1_17_1 , level #endif ,
@@ -195,17 +212,21 @@ public class ChunkLoader
 				: new ProtoTickList<Fluid>(fluid -> (fluid == null || fluid == Fluids.EMPTY), chunkPos,
 				tagLevel.getList("LiquidsToBeTicked", 9)#if MC_VER >= MC_1_17_1 , level #endif );
 		#else
-		#if MC_VER < MC_1_19_4
-		LevelChunkTicks<Block> blockTicks = LevelChunkTicks.load(tagLevel.getList(BLOCK_TICKS_TAG_18, 10),
-				string -> Registry.BLOCK.getOptional(ResourceLocation.tryParse(string)), chunkPos);
-		LevelChunkTicks<Fluid> fluidTicks = LevelChunkTicks.load(tagLevel.getList(FLUID_TICKS_TAG_18, 10),
-				string -> Registry.FLUID.getOptional(ResourceLocation.tryParse(string)), chunkPos);
-		#else
-		LevelChunkTicks<Block> blockTicks = LevelChunkTicks.load(tagLevel.getList(BLOCK_TICKS_TAG_18, 10),
-				(string -> BuiltInRegistries.BLOCK.getOptional(ResourceLocation.tryParse(string))), chunkPos);
-		LevelChunkTicks<Fluid> fluidTicks = LevelChunkTicks.load(tagLevel.getList(FLUID_TICKS_TAG_18, 10),
-				string -> BuiltInRegistries.FLUID.getOptional(ResourceLocation.tryParse(string)), chunkPos);
-		#endif
+			#if MC_VER < MC_1_19_4
+				LevelChunkTicks<Block> blockTicks = LevelChunkTicks.load(tagLevel.getList(BLOCK_TICKS_TAG_18, 10),
+						string -> Registry.BLOCK.getOptional(ResourceLocation.tryParse(string)), chunkPos);
+				LevelChunkTicks<Fluid> fluidTicks = LevelChunkTicks.load(tagLevel.getList(FLUID_TICKS_TAG_18, 10),
+						string -> Registry.FLUID.getOptional(ResourceLocation.tryParse(string)), chunkPos);
+			#elif MC_VER < MC_1_21_4
+				LevelChunkTicks<Block> blockTicks = LevelChunkTicks.load(tagLevel.getList(BLOCK_TICKS_TAG_18, 10),
+						(string -> BuiltInRegistries.BLOCK.getOptional(ResourceLocation.tryParse(string))), chunkPos);
+				LevelChunkTicks<Fluid> fluidTicks = LevelChunkTicks.load(tagLevel.getList(FLUID_TICKS_TAG_18, 10),
+						string -> BuiltInRegistries.FLUID.getOptional(ResourceLocation.tryParse(string)), chunkPos);
+			#else
+				// do we need the ticks for what we're doing?
+				LevelChunkTicks<Block> blockTicks = new LevelChunkTicks<>();
+				LevelChunkTicks<Fluid> fluidTicks = new LevelChunkTicks<>();
+			#endif
 		#endif
 		
 		LevelChunkSection[] levelChunkSections = readSections(level, chunkPos, tagLevel);
@@ -215,7 +236,6 @@ public class ChunkLoader
 		LevelChunk chunk = new LevelChunk((Level) level.getLevel(), chunkPos, chunkBiomeContainer, upgradeData, blockTicks,
 				fluidTicks, inhabitedTime, levelChunkSections, null);
 		#else
-		
 		LevelChunk chunk = new LevelChunk((Level) level, chunkPos, upgradeData, blockTicks,
 				fluidTicks, inhabitedTime, levelChunkSections, null, blendingData);
 		#endif
@@ -249,18 +269,23 @@ public class ChunkLoader
 				biomes.asHolderIdMap(), biomes.holderByNameCodec(), PalettedContainer.Strategy.SECTION_BIOMES, biomes.getOrThrow(Biomes.PLAINS));
 			#endif
 		#endif
+		
 		int sectionYIndex = #if MC_VER < MC_1_17_1 16; #else level.getSectionsCount(); #endif
 		LevelChunkSection[] chunkSections = new LevelChunkSection[sectionYIndex];
 		
-		boolean isLightOn = chunkData.getBoolean("isLightOn");
-		boolean hasSkyLight = level.dimensionType().hasSkyLight();
-		ListTag tagSections = chunkData.getList("Sections", 10);
-		if (tagSections.isEmpty()) tagSections = chunkData.getList("sections", 10);
-		
-		for (int j = 0; j < tagSections.size(); ++j)
+		ListTag tagSections = tagGetListTag(chunkData, "Sections", 10);
+		if (tagSections == null || tagSections.isEmpty())
 		{
-			CompoundTag tagSection = tagSections.getCompound(j);
-			int sectionYPos = tagSection.getByte("Y");
+			tagSections = tagGetListTag(chunkData, "sections", 10);
+		}
+		
+		
+		if (tagSections != null)
+		{
+			for (int j = 0; j < tagSections.size(); ++j)
+			{
+				CompoundTag tagSection = tagGetCompoundTag(tagSections, j);
+				int sectionYPos = tagGetByte(tagSection, "Y");
 
 			#if MC_VER < MC_1_18_2
 			if (tagSection.contains("Palette", 9) && tagSection.contains("BlockStates", 12))
@@ -274,63 +299,89 @@ public class ChunkLoader
 							= levelChunkSection;
 			}
 			#else
-			int sectionId = level.getSectionIndexFromSectionY(sectionYPos);
-			if (sectionId >= 0 && sectionId < chunkSections.length)
-			{
-				PalettedContainer<BlockState> blockStateContainer;
+				int sectionId = level.getSectionIndexFromSectionY(sectionYPos);
+				if (sectionId >= 0 && sectionId < chunkSections.length)
+				{
+					PalettedContainer<BlockState> blockStateContainer;
 				#if MC_VER < MC_1_18_2
 				PalettedContainer<Biome> biomeContainer;
 				#else
-				PalettedContainer<Holder<Biome>> biomeContainer;
+					PalettedContainer<Holder<Biome>> biomeContainer;
 				#endif
+					
+					boolean containsBlockStates;
+				#if MC_VER < MC_1_21_5
+				containsBlockStates = tagSection.contains("block_states", 10);
+				#else
+					containsBlockStates = tagSection.contains("block_states");
+				#endif
+					
+					if (containsBlockStates)
+					{
+					#if MC_VER < MC_1_20_6 
+					blockStateContainer = BLOCK_STATE_CODEC.parse(NbtOps.INSTANCE, tagGetCompoundTag(tagSection, "block_states"))
+						.promotePartial(string -> logBlockDeserializationWarning(chunkPos, sectionYPos, string))
+						.getOrThrow(false, (message) -> logParsingWarningOnce(message));
+					#else
+						blockStateContainer = BLOCK_STATE_CODEC.parse(NbtOps.INSTANCE, tagGetCompoundTag(tagSection, "block_states"))
+								.promotePartial(string -> logBlockDeserializationWarning(chunkPos, sectionYPos, string))
+								.getOrThrow((message) -> logErrorAndReturnException(message));
+					#endif
+					}
+					else
+					{
+						blockStateContainer = new PalettedContainer<BlockState>(Block.BLOCK_STATE_REGISTRY, Blocks.AIR.defaultBlockState(), PalettedContainer.Strategy.SECTION_STATES);
+					}
+				
 				
-				blockStateContainer = tagSection.contains("block_states", 10)
-						? BLOCK_STATE_CODEC.parse(NbtOps.INSTANCE, tagSection.getCompound("block_states")).promotePartial(string -> logBlockDeserializationWarning(chunkPos, sectionYPos, string))
-						#if MC_VER < MC_1_20_6 
-						.getOrThrow(false, LOGGER::error)
-						#else
-						.getOrThrow((message) -> (RuntimeException) LOGGER.errorAndThrow(message, null)) 
-						#endif
-						: new PalettedContainer<BlockState>(Block.BLOCK_STATE_REGISTRY, Blocks.AIR.defaultBlockState(), PalettedContainer.Strategy.SECTION_STATES);
-
 				#if MC_VER < MC_1_18_2
 				biomeContainer = tagSection.contains("biomes", 10)
-						? biomeCodec.parse(NbtOps.INSTANCE, tagSection.getCompound("biomes")).promotePartial(string -> logErrors(chunkPos, sectionYPos, string)).getOrThrow(false, LOGGER::error)
+						? biomeCodec.parse(NbtOps.INSTANCE, tagSection.getCompound("biomes")).promotePartial(string -> logErrors(chunkPos, sectionYPos, string)).getOrThrow(false, (message) -> logWarningOnce(message))
 						: new PalettedContainer<Biome>(biomes, biomes.getOrThrow(Biomes.PLAINS), PalettedContainer.Strategy.SECTION_BIOMES);
 				#else
-				
-				
-				if (tagSection.contains("biomes", 10))
-				{
-					biomeContainer =
-						biomeCodec.parse(NbtOps.INSTANCE, tagSection.getCompound("biomes")).promotePartial(string -> logBiomeDeserializationWarning(chunkPos, sectionYIndex, (String) string))
-						#if MC_VER < MC_1_20_6 
-						.getOrThrow(false, LOGGER::error);
-						#else
-						.getOrThrow((message) -> (RuntimeException) LOGGER.errorAndThrow(message, null));
-						#endif
-				}
-				else
-				{
-					biomeContainer = new PalettedContainer<Holder<Biome>>(biomes.asHolderIdMap(), 
+					
+					
+					boolean containsBiomes;
+				#if MC_VER < MC_1_21_5
+				containsBiomes = tagSection.contains("biomes", 10);
+				#else
+					containsBiomes = tagSection.contains("biomes");
+				#endif
+					
+					if (containsBiomes)
+					{
+					#if MC_VER < MC_1_20_6 
+					biomeContainer = biomeCodec.parse(NbtOps.INSTANCE, tagGetCompoundTag(tagSection, "biomes"))
+						.promotePartial(string -> logBiomeDeserializationWarning(chunkPos, sectionYIndex, (String) string))
+						.getOrThrow(false, (message) -> logParsingWarningOnce(message));
+					#else
+						biomeContainer = biomeCodec.parse(NbtOps.INSTANCE, tagGetCompoundTag(tagSection, "biomes"))
+								.promotePartial(string -> logBiomeDeserializationWarning(chunkPos, sectionYIndex, (String) string))
+								.getOrThrow((message) -> logErrorAndReturnException(message));
+					#endif
+					}
+					else
+					{
+						biomeContainer = new PalettedContainer<Holder<Biome>>(biomes.asHolderIdMap(), 
 							#if MC_VER < MC_1_21_3
 							biomes.getHolderOrThrow(Biomes.PLAINS), 
 							#else
-							biomes.getOrThrow(Biomes.PLAINS),
+								biomes.getOrThrow(Biomes.PLAINS),
 							#endif
-							PalettedContainer.Strategy.SECTION_BIOMES);
-				}
+								PalettedContainer.Strategy.SECTION_BIOMES);
+					}
 				
 				#endif
 				
 				#if MC_VER < MC_1_20_1
 				chunkSections[sectionId] = new LevelChunkSection(sectionYPos, blockStateContainer, biomeContainer);
 				#else
-				chunkSections[sectionId] = new LevelChunkSection(blockStateContainer, biomeContainer);
+					chunkSections[sectionId] = new LevelChunkSection(blockStateContainer, biomeContainer);
 				#endif
-			}
+				}
 			#endif
-			
+				
+			}	
 		}
 		return chunkSections;
 	}
@@ -340,39 +391,54 @@ public class ChunkLoader
 		#else ChunkType #endif 
 	readChunkType(CompoundTag tagLevel)
 	{
-		ChunkStatus chunkStatus = ChunkStatus.byName(tagLevel.getString("Status"));
+		ChunkStatus chunkStatus = ChunkStatus.byName(tagGetString(tagLevel,"Status"));
 		if (chunkStatus != null)
 		{
 			return chunkStatus.getChunkType();
 		}
 		
-		return 
-				#if MC_VER <= MC_1_20_4 ChunkStatus.ChunkType.PROTOCHUNK;
-				#else ChunkType.PROTOCHUNK; #endif
+		#if MC_VER <= MC_1_20_4
+		return ChunkStatus.ChunkType.PROTOCHUNK;
+		#else
+		return ChunkType.PROTOCHUNK;
+		#endif
 	}
 	private static void readHeightmaps(LevelChunk chunk, CompoundTag chunkData)
 	{
-		CompoundTag tagHeightmaps = chunkData.getCompound("Heightmaps");
+		CompoundTag tagHeightmaps = tagGetCompoundTag(chunkData, "Heightmaps");
 		for (Heightmap.Types type : ChunkStatus.FULL.heightmapsAfter())
 		{
 			String heightmap = type.getSerializationKey();
+			#if MC_VER < MC_1_21_5
 			if (tagHeightmaps.contains(heightmap, 12))
+			{
 				chunk.setHeightmap(type, tagHeightmaps.getLongArray(heightmap));
+			}
+			#else
+			if (tagHeightmaps.contains(heightmap))
+			{
+				Optional<long[]> optionalHeightmap = tagHeightmaps.getLongArray(heightmap);
+				if (optionalHeightmap.isPresent())
+				{
+					chunk.setHeightmap(type, optionalHeightmap.get());
+				}
+			}
+			#endif
 		}
 		Heightmap.primeHeightmaps(chunk, ChunkStatus.FULL.heightmapsAfter());
 	}
 	private static void readPostPocessings(LevelChunk chunk, CompoundTag chunkData)
 	{
-		ListTag tagPostProcessings = chunkData.getList("PostProcessing", 9);
+		ListTag tagPostProcessings = tagGetListTag(chunkData,"PostProcessing", 9);
 		for (int i = 0; i < tagPostProcessings.size(); ++i)
 		{
-			ListTag listTag3 = tagPostProcessings.getList(i);
+			ListTag listTag3 = tagGetListTag(tagPostProcessings, i);
 			for (int j = 0; j < listTag3.size(); ++j)
 			{
 				#if MC_VER < MC_1_21_3
 				chunk.addPackedPostProcess(listTag3.getShort(j), i);
 				#else
-				chunk.addPackedPostProcess(ShortList.of(listTag3.getShort(j)), i);
+				chunk.addPackedPostProcess(ShortList.of(tagGetShort(listTag3, j)), i);
 				#endif
 			}
 		}
@@ -381,16 +447,38 @@ public class ChunkLoader
 	private static BlendingData readBlendingData(CompoundTag chunkData)
 	{
 		BlendingData blendingData = null;
-		if (chunkData.contains("blending_data", 10))
+		
+		
+		boolean containsBlendingData;
+		#if MC_VER < MC_1_21_5
+		containsBlendingData = chunkData.contains("blending_data", 10);
+		#else
+		containsBlendingData = chunkData.contains("blending_data");
+		#endif
+		
+		if (containsBlendingData)
 		{
 			@SuppressWarnings({"unchecked", "rawtypes"})
 			Dynamic<CompoundTag> blendingDataTag = new Dynamic(NbtOps.INSTANCE, chunkData.getCompound("blending_data"));
 			
-			#if MC_VER < MC_1_21_3
-			blendingData = BlendingData.CODEC.parse(blendingDataTag).resultOrPartial(LOGGER::error).orElse(null);
-			#else
-			blendingData = BlendingData.unpack(BlendingData.Packed.CODEC.parse(blendingDataTag).resultOrPartial(LOGGER::error).orElse(null));
-			#endif
+			try
+			{
+				#if MC_VER < MC_1_21_3
+				blendingData = BlendingData.CODEC.parse(blendingDataTag).resultOrPartial((message) -> logParsingWarningOnce(message)).orElse(null);
+				#else
+				blendingData = BlendingData.unpack(BlendingData.Packed.CODEC.parse(blendingDataTag).resultOrPartial((message) -> logParsingWarningOnce(message)).orElse(null));
+				#endif
+			}
+			catch (Exception e)
+			{
+				String message = e.getMessage();
+				if (message == null || message.trim().isEmpty())
+				{
+					message = "Failed to parse blending data";
+				}
+				
+				logParsingWarningOnce(message, e);
+			}
 		}
 		return blendingData;
 	}
@@ -467,33 +555,37 @@ public class ChunkLoader
 			
 			
 			// if null all lights = 0
-			byte[] blockLightNibbleArray = chunkSectionCompoundTag.getByteArray("BlockLight");
-			byte[] skyLightNibbleArray = chunkSectionCompoundTag.getByteArray("SkyLight");
+			byte[] blockLightNibbleArray = tagGetByteArray(chunkSectionCompoundTag, "BlockLight");
+			byte[] skyLightNibbleArray = tagGetByteArray(chunkSectionCompoundTag, "SkyLight");
 			
-			// if any sky light was found then all lights above will be max brightness
-			if (skyLightNibbleArray.length != 0)
+			if (blockLightNibbleArray != null 
+				&& skyLightNibbleArray != null)
 			{
-				foundSkyLight = true;
-			}
-			
-			for (int relX = 0; relX < LodUtil.CHUNK_WIDTH; relX++)
-			{
-				for (int relZ = 0; relZ < LodUtil.CHUNK_WIDTH; relZ++)
+				// if any sky light was found then all lights above will be max brightness
+				if (skyLightNibbleArray.length != 0)
 				{
-					// chunk sections are also 16 blocks tall
-					for (int relY = 0; relY < LodUtil.CHUNK_WIDTH; relY++)
+					foundSkyLight = true;
+				}
+				
+				for (int relX = 0; relX < LodUtil.CHUNK_WIDTH; relX++)
+				{
+					for (int relZ = 0; relZ < LodUtil.CHUNK_WIDTH; relZ++)
 					{
-						int blockPosIndex = relY*16*16 + relZ*16 + relX;
-						byte blockLight = (blockLightNibbleArray.length == 0) ? 0 : getNibbleAtIndex(blockLightNibbleArray, blockPosIndex);
-						byte skyLight = (skyLightNibbleArray.length == 0) ? 0 : getNibbleAtIndex(skyLightNibbleArray, blockPosIndex);
-						if (skyLightNibbleArray.length == 0 && foundSkyLight)
+						// chunk sections are also 16 blocks tall
+						for (int relY = 0; relY < LodUtil.CHUNK_WIDTH; relY++)
 						{
-							skyLight = LodUtil.MAX_MC_LIGHT;
+							int blockPosIndex = relY*16*16 + relZ*16 + relX;
+							byte blockLight = (blockLightNibbleArray.length == 0) ? 0 : getNibbleAtIndex(blockLightNibbleArray, blockPosIndex);
+							byte skyLight = (skyLightNibbleArray.length == 0) ? 0 : getNibbleAtIndex(skyLightNibbleArray, blockPosIndex);
+							if (skyLightNibbleArray.length == 0 && foundSkyLight)
+							{
+								skyLight = LodUtil.MAX_MC_LIGHT;
+							}
+							
+							int y = relY + (sectionIndex * LodUtil.CHUNK_WIDTH) + ChunkWrapper.getInclusiveMinBuildHeight(chunk);
+							blockLightStorage.set(relX, y, relZ, blockLight);
+							skyLightStorage.set(relX, y, relZ, skyLight);
 						}
-						
-						int y = relY + (sectionIndex * LodUtil.CHUNK_WIDTH) + ChunkWrapper.getInclusiveMinBuildHeight(chunk);
-						blockLightStorage.set(relX, y, relZ, blockLight);
-						skyLightStorage.set(relX, y, relZ, skyLight);
 					}
 				}
 			}
@@ -515,13 +607,192 @@ public class ChunkLoader
 		}
 	}
 	
+	
+	
+	//=========//
+	// logging //
+	//=========//
+	
 	private static void logBlockDeserializationWarning(ChunkPos chunkPos, int sectionYIndex, String message)
 	{
-		LOGGER.warn("Unable to deserialize blocks for chunk section [" + chunkPos.x + ", " + sectionYIndex + ", " + chunkPos.z + "], error: ["+message+"]. This can probably be ignored, although if your world looks wrong, optimizing it via the single player menu then deleting your DH database(s) should fix the problem.");
+		LOGGED_ERROR_MESSAGE_MAP.computeIfAbsent(message, (newMessage) ->
+		{
+			LOGGER.warn("Unable to deserialize blocks for chunk section [" + chunkPos.x + ", " + sectionYIndex + ", " + chunkPos.z + "], error: ["+newMessage+"]. " +
+					"This can probably be ignored, although if your world looks wrong, optimizing it via the single player menu then deleting your DH database(s) should fix the problem.");
+			
+			return newMessage;
+		});
 	}
 	private static void logBiomeDeserializationWarning(ChunkPos chunkPos, int sectionYIndex, String message)
 	{
-		LOGGER.warn("Unable to deserialize biomes for chunk section [" + chunkPos.x + ", " + sectionYIndex + ", " + chunkPos.z + "], error: ["+message+"]. This can probably be ignored, although if your world looks wrong, optimizing it via the single player menu then deleting your DH database(s) should fix the problem.");
+		LOGGED_ERROR_MESSAGE_MAP.computeIfAbsent(message, (newMessage) -> 
+		{
+			LOGGER.warn("Unable to deserialize biomes for chunk section [" + chunkPos.x + ", " + sectionYIndex + ", " + chunkPos.z + "], error: ["+newMessage+"]. " +
+					"This can probably be ignored, although if your world looks wrong, optimizing it via the single player menu then deleting your DH database(s) should fix the problem.");
+			
+			return newMessage;
+		});
+	}
+	
+	private static void logParsingWarningOnce(String message) { logParsingWarningOnce(message, null); }
+	private static void logParsingWarningOnce(String message, Exception e)
+	{
+		if (message == null)
+		{
+			return;
+		}
+		
+		LOGGED_ERROR_MESSAGE_MAP.computeIfAbsent(message, (newMessage) ->
+		{
+			LOGGER.warn("Parsing error: ["+newMessage+"]. " +
+					"This can probably be ignored, although if your world looks wrong, optimizing it via the single player menu then deleting your DH database(s) should fix the problem.",
+					e);
+			
+			return newMessage;
+		});
+	}
+	
+	private static RuntimeException logErrorAndReturnException(String message)
+	{
+		LOGGED_ERROR_MESSAGE_MAP.computeIfAbsent(message, (newMessage) ->
+		{
+			LOGGER.warn("Parsing error: ["+newMessage+"]. " +
+					"This can probably be ignored, although if your world looks wrong, optimizing it via the single player menu then deleting your DH database(s) should fix the problem.");
+			
+			return newMessage;
+		});
+		
+		// Currently we want to ignore these errors, if returning null is a problem, we can change this later
+		return null; //new RuntimeException(message);
+	}
+	
+	
+	
+	//====================//
+	// tag helper methods //
+	//====================//
+	
+	// TODO move into separate file (this file is getting long)
+	// these tag helpers are to simplify tag accessing between MC versions
+	
+	/** defaults to "false" if the tag isn't present */
+	private static boolean tagGetBoolean(CompoundTag tag, String key)
+	{
+		#if MC_VER < MC_1_21_5
+		return tag.getBoolean(key);
+		#else
+		return tag.getBoolean(key).orElse(false);
+		#endif
+	}
+	
+	/** defaults to "0" if the tag isn't present */
+	private static byte tagGetByte(CompoundTag tag, String key)
+	{
+		#if MC_VER < MC_1_21_5
+		return tag.getByte(key);
+		#else
+		return tag.getByte(key).orElse((byte)0);
+		#endif
+	}
+	
+	/** defaults to "0" if the tag isn't present */
+	private static short tagGetShort(ListTag tag, int index)
+	{
+		#if MC_VER < MC_1_21_5
+		return tag.getShort(index);
+		#else
+		return tag.getShort(index).orElse((short)0);
+		#endif
+	}
+	
+	/** defaults to "0" if the tag isn't present */
+	private static int tagGetInt(CompoundTag tag, String key)
+	{
+		#if MC_VER < MC_1_21_5
+		return tag.getInt(key);
+		#else
+		return tag.getInt(key).orElse(0);
+		#endif
+	}
+	
+	/** defaults to "0" if the tag isn't present */
+	private static long tagGetLong(CompoundTag tag, String key)
+	{
+		#if MC_VER < MC_1_21_5
+		return tag.getInt(key);
+		#else
+		return tag.getLong(key).orElse(0L);
+		#endif
+	}
+	
+	
+	
+	/** defaults to null if the tag isn't present */
+	private static String tagGetString(CompoundTag tag, String key)
+	{
+		#if MC_VER < MC_1_21_5
+		return tag.getString(key);
+		#else
+		return tag.getString(key).orElse(null);
+		#endif
+	}
+	
+	/** defaults to null if the tag isn't present */
+	private static byte[] tagGetByteArray(CompoundTag tag, String key)
+	{
+		#if MC_VER < MC_1_21_5
+		return tag.getByteArray(key);
+		#else
+		return tag.getByteArray(key).orElse(null);
+		#endif
+	}
+	
+	
+	
+	/** defaults to null if the tag isn't present */
+	@Nullable
+	private static CompoundTag tagGetCompoundTag(CompoundTag tag, String key)
+	{
+		#if MC_VER < MC_1_21_5
+		return tag.getCompound(key);
+		#else
+		return tag.getCompound(key).orElse(null);
+		#endif
+	}
+	/** defaults to null if the tag isn't present */
+	@Nullable
+	private static CompoundTag tagGetCompoundTag(ListTag tag, int index)
+	{
+		#if MC_VER < MC_1_21_5
+		return tag.getCompound(index);
+		#else
+		return tag.getCompound(index).orElse(null);
+		#endif
+	}
+	
+	/** 
+	 * defaults to null if the tag isn't present
+	 * @param elementType unused after MC 1.21.5
+	 */
+	@Nullable
+	private static ListTag tagGetListTag(CompoundTag tag, String key, int elementType)
+	{
+		#if MC_VER < MC_1_21_5
+		return tag.getList(key, elementType);
+		#else
+		return tag.getList(key).orElse(null);
+		#endif
+	}
+	
+	/** defaults to null if the tag isn't present */
+	@Nullable
+	private static ListTag tagGetListTag(ListTag tag, int index)
+	{
+		#if MC_VER < MC_1_21_5
+		return tag.getList(index);
+		#else
+		return tag.getList(index).orElse(null);
+		#endif
 	}
 	
 	

common/src/main/java/com/seibel/distanthorizons/common/wrappers/worldGeneration/mimicObject/DhLitWorldGenRegion.java

@@ -229,8 +229,16 @@ public class DhLitWorldGenRegion extends WorldGenRegion
 	{
 		ChunkAccess chunkAccess = this.getChunk(blockPos);
 		if (chunkAccess instanceof LevelChunk)
+		{
 			return true;
+		}
+		
+		#if MC_VER < MC_1_21_5
 		chunkAccess.setBlockState(blockPos, blockState, /*isBlockMoving*/false);
+		#else
+		chunkAccess.setBlockState(blockPos, blockState, /*flags*/0);
+		#endif
+		
 		// This is for post ticking for water on gen and stuff like that. Not enabled
 		// for now.
 		// if (blockState.hasPostProcess(this, blockPos))

fabric/build.gradle

@@ -1,5 +1,5 @@
 plugins {
-    id "fabric-loom" version "1.8-SNAPSHOT"
+    id "fabric-loom" version "1.10-SNAPSHOT"
 }
 
 loom {

fabric/src/main/java/com/seibel/distanthorizons/fabric/FabricClientProxy.java

@@ -33,6 +33,7 @@ import com.seibel.distanthorizons.core.dependencyInjection.SingletonInjector;
 import com.seibel.distanthorizons.core.logging.DhLoggerBuilder;
 import com.seibel.distanthorizons.core.util.threading.ThreadPoolUtil;
 import com.seibel.distanthorizons.core.wrapperInterfaces.minecraft.IMinecraftClientWrapper;
+import com.seibel.distanthorizons.core.wrapperInterfaces.misc.IPluginPacketSender;
 import com.seibel.distanthorizons.core.wrapperInterfaces.modAccessor.ISodiumAccessor;
 import com.seibel.distanthorizons.core.wrapperInterfaces.world.IClientLevelWrapper;
 import com.seibel.distanthorizons.core.util.math.Mat4f;
@@ -82,6 +83,7 @@ public class FabricClientProxy implements AbstractModInitializer.IEventProxy
 {
 	private final ClientApi clientApi = ClientApi.INSTANCE;
 	private static final IMinecraftClientWrapper MC = SingletonInjector.INSTANCE.get(IMinecraftClientWrapper.class);
+	private static final AbstractPluginPacketSender PACKET_SENDER = (AbstractPluginPacketSender) SingletonInjector.INSTANCE.get(IPluginPacketSender.class);
 	private static final Logger LOGGER = DhLoggerBuilder.getLogger();
 	
 	// TODO we shouldn't be filtering keys on the Forge/Fabric side, only in ClientApi
@@ -316,9 +318,7 @@ public class FabricClientProxy implements AbstractModInitializer.IEventProxy
 		#else
 		ClientPlayNetworking.registerGlobalReceiver(AbstractPluginPacketSender.WRAPPER_PACKET_RESOURCE, (client, handler, buffer, packetSender) ->
 		{
-			// Forge packet ID
-			buffer.readByte();
-			AbstractNetworkMessage message = AbstractPluginPacketSender.decodeMessage(buffer);
+			AbstractNetworkMessage message = PACKET_SENDER.decodeMessage(buffer);
 			if (message != null)
 			{
 				ClientApi.INSTANCE.pluginMessageReceived(message);

fabric/src/main/java/com/seibel/distanthorizons/fabric/FabricMain.java

@@ -90,8 +90,8 @@ public class FabricMain extends AbstractModInitializer implements ClientModIniti
 		{
 			ModAccessorInjector.INSTANCE.bind(ISodiumAccessor.class, new SodiumAccessor());
 			
-			// If sodium is installed Indium is also necessary in order to use the Fabric rendering API
-			if (!modChecker.isModLoaded("indium"))
+			// If sodium is installed Indium is also necessary for versions 0.5 and less in order to use the Fabric rendering API
+			if (!modChecker.isModLoaded("indium") && SodiumAccessor.isSodiumV5OrLess)
 			{
 				String indiumMissingMessage = ModInfo.READABLE_NAME + " needs Indium to work with Sodium.\nPlease download Indium from https://modrinth.com/mod/indium";
 				LOGGER.fatal(indiumMissingMessage);

fabric/src/main/java/com/seibel/distanthorizons/fabric/FabricPluginPacketSender.java

@@ -22,9 +22,7 @@ public class FabricPluginPacketSender extends AbstractPluginPacketSender
 		ClientPlayNetworking.send(new CommonPacketPayload(message));
 		#else // < 1.20.6
 		FriendlyByteBuf buffer = PacketByteBufs.create();
-		// Forge packet ID
-		buffer.writeByte(0);
-		AbstractPluginPacketSender.encodeMessage(buffer, message);
+		this.encodeMessage(buffer, message);
 		ClientPlayNetworking.send(WRAPPER_PACKET_RESOURCE, buffer);
 		#endif
 	}
@@ -36,9 +34,7 @@ public class FabricPluginPacketSender extends AbstractPluginPacketSender
 		ServerPlayNetworking.send(serverPlayer, new CommonPacketPayload(message));
 		#else // < 1.20.6
 		FriendlyByteBuf buffer = PacketByteBufs.create();
-		// Forge packet ID
-		buffer.writeByte(0);
-		AbstractPluginPacketSender.encodeMessage(buffer, message);
+		this.encodeMessage(buffer, message);
 		ServerPlayNetworking.send(serverPlayer, WRAPPER_PACKET_RESOURCE, buffer);
 		#endif
 	}

fabric/src/main/java/com/seibel/distanthorizons/fabric/FabricServerProxy.java

@@ -9,7 +9,10 @@ import com.seibel.distanthorizons.common.wrappers.world.ClientLevelWrapper;
 import com.seibel.distanthorizons.common.wrappers.world.ServerLevelWrapper;
 import com.seibel.distanthorizons.common.wrappers.worldGeneration.BatchGenerationEnvironment;
 import com.seibel.distanthorizons.core.api.internal.ServerApi;
+import com.seibel.distanthorizons.core.dependencyInjection.SingletonInjector;
+import com.seibel.distanthorizons.common.AbstractPluginPacketSender;
 import com.seibel.distanthorizons.core.logging.DhLoggerBuilder;
+import com.seibel.distanthorizons.core.wrapperInterfaces.misc.IPluginPacketSender;
 import com.seibel.distanthorizons.core.wrapperInterfaces.world.IClientLevelWrapper;
 import com.seibel.distanthorizons.core.wrapperInterfaces.world.ILevelWrapper;
 import com.seibel.distanthorizons.fabric.testing.TestWorldGenBindingEvent;
@@ -32,7 +35,6 @@ import com.seibel.distanthorizons.common.CommonPacketPayload;
 import net.fabricmc.fabric.api.networking.v1.PayloadTypeRegistry;
 #else
 import com.seibel.distanthorizons.core.network.messages.AbstractNetworkMessage;
-import com.seibel.distanthorizons.common.AbstractPluginPacketSender;
 #endif
 
 import java.util.function.Supplier;
@@ -48,6 +50,8 @@ import java.util.function.Supplier;
 public class FabricServerProxy implements AbstractModInitializer.IEventProxy
 {
 	private static final ServerApi SERVER_API = ServerApi.INSTANCE;
+	@SuppressWarnings("unused")
+	private static final AbstractPluginPacketSender PACKET_SENDER = (AbstractPluginPacketSender) SingletonInjector.INSTANCE.get(IPluginPacketSender.class);
 	private static final Logger LOGGER = DhLoggerBuilder.getLogger();
 	
 	private final boolean isDedicatedServer;
@@ -192,9 +196,7 @@ public class FabricServerProxy implements AbstractModInitializer.IEventProxy
 		#else
 		ServerPlayNetworking.registerGlobalReceiver(AbstractPluginPacketSender.WRAPPER_PACKET_RESOURCE, (server, serverPlayer, handler, buffer, packetSender) ->
 		{
-			// Forge packet ID
-			buffer.readByte();
-			AbstractNetworkMessage message = AbstractPluginPacketSender.decodeMessage(buffer);
+			AbstractNetworkMessage message = PACKET_SENDER.decodeMessage(buffer);
 			if (message != null)
 			{
 				ServerApi.INSTANCE.pluginMessageReceived(ServerPlayerWrapper.getWrapper(serverPlayer), message);

fabric/src/main/java/com/seibel/distanthorizons/fabric/mixins/client/MixinLightTexture.java

@@ -34,21 +34,34 @@ import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
 
 #if MC_VER < MC_1_21_3
 import com.mojang.blaze3d.platform.NativeImage;
-#else
+#elif MC_VER < MC_1_21_5
 import com.mojang.blaze3d.pipeline.TextureTarget;
+#else
+import com.mojang.blaze3d.opengl.GlTexture;
+import com.mojang.blaze3d.systems.RenderSystem;
+import com.mojang.blaze3d.textures.GpuTexture;
 #endif
 
 @Mixin(LightTexture.class)
 public class MixinLightTexture
 {
-	@Shadow 
-	@Final 
+	 
 	#if MC_VER < MC_1_21_3
+	@Shadow 
+	@Final
 	private NativeImage lightPixels;
-	#else
+	#elif MC_VER < MC_1_21_5
+	@Shadow
+	@Final
 	private TextureTarget target;
+	#else
+	@Shadow
+	@Final
+	private GpuTexture texture;
 	#endif
 	
+	
+	
 	@Inject(method = "updateLightTexture(F)V", at = @At("RETURN"))
 	public void updateLightTexture(float partialTicks, CallbackInfo ci)
 	{
@@ -63,8 +76,11 @@ public class MixinLightTexture
 		
 		#if MC_VER < MC_1_21_3
 		MinecraftRenderWrapper.INSTANCE.updateLightmap(this.lightPixels, clientLevel);
-		#else
+		#elif MC_VER < MC_1_21_5
 		MinecraftRenderWrapper.INSTANCE.setLightmapId(this.target.getColorTextureId(), clientLevel);
+		#else
+		GlTexture glTexture = (GlTexture) this.texture;
+		MinecraftRenderWrapper.INSTANCE.setLightmapId(glTexture.glId(), clientLevel);
 		#endif
 	}
 	

fabric/src/main/java/com/seibel/distanthorizons/fabric/mixins/client/MixinMinecraft.java

@@ -76,15 +76,25 @@ public abstract class MixinMinecraft
 		
 		if (SelfUpdater.onStart() || DEBUG_ALWAYS_SHOW_UPDATER)
 		{
-			instance.setScreen(new UpdateModScreen(
-					new TitleScreen(false), // We don't want to use the vanilla title screen as it would fade the buttons
-					(Config.Client.Advanced.AutoUpdater.updateBranch.get() == EDhApiUpdateBranch.STABLE ? ModrinthGetter.getLatestIDForVersion(SingletonInjector.INSTANCE.get(IVersionConstants.class).getMinecraftVersion()): GitlabGetter.INSTANCE.projectPipelines.get(0).get("sha"))
-			));
-		}
-		else
-		{
-			instance.setScreen(guiScreen); // Sets the screen back to the vanilla screen as if nothing ever happened
+			try
+			{
+				instance.setScreen(new UpdateModScreen(
+						new TitleScreen(false), // We don't want to use the vanilla title screen as it would fade the buttons
+						(Config.Client.Advanced.AutoUpdater.updateBranch.get() == EDhApiUpdateBranch.STABLE ? ModrinthGetter.getLatestIDForVersion(SingletonInjector.INSTANCE.get(IVersionConstants.class).getMinecraftVersion()): GitlabGetter.INSTANCE.projectPipelines.get(0).get("sha"))
+				));
+				return;
+			}
+			catch (Exception e)
+			{
+				// info instead of error since this can be ignored and probably just means
+				// there isn't a new DH version available
+				LOGGER.info("Unable to show DH update screen, reason: ["+e.getMessage()+"].");
+			}
 		}
+		
+		// Sets the screen back to the vanilla screen as if nothing ever happened
+		// if not done the game will crash
+		instance.setScreen(guiScreen);
 	}
 	#endif
 	
@@ -124,14 +134,13 @@ public abstract class MixinMinecraft
 				{
 					try
 					{
-						
 						Minecraft.getInstance().setScreen(new UpdateModScreen(
 								// TODO: Change to runnable, instead of tittle screen
 								new TitleScreen(false), // We don't want to use the vanilla title screen as it would fade the buttons
 								versionId
 						));
 					}
-					catch (IllegalArgumentException e)
+					catch (Exception e)
 					{
 						// info instead of error since this can be ignored and probably just means
 						// there isn't a new DH version available

fabric/src/main/java/com/seibel/distanthorizons/fabric/mixins/client/MixinTextureUtil.java

@@ -1,12 +1,15 @@
 package com.seibel.distanthorizons.fabric.mixins.client;
 
+#if MC_VER < MC_1_21_5
 import com.mojang.blaze3d.platform.GlStateManager;
+#endif
 import com.mojang.blaze3d.platform.TextureUtil;
 import com.seibel.distanthorizons.core.config.Config;
 import org.spongepowered.asm.mixin.Mixin;
 import org.spongepowered.asm.mixin.injection.At;
 import org.spongepowered.asm.mixin.injection.Redirect;
 
+
 /**
  * Sets Minecraft's LOD Bias (looks similar to mipmaps)
  *
@@ -15,6 +18,9 @@ import org.spongepowered.asm.mixin.injection.Redirect;
 @Mixin(TextureUtil.class)
 public class MixinTextureUtil
 {
+	// TODO fix for MC 1.21.5+
+	
+	#if MC_VER < MC_1_21_5
 	@Redirect(method = "Lcom/mojang/blaze3d/platform/TextureUtil;prepareImage(Lcom/mojang/blaze3d/platform/NativeImage$InternalGlFormat;IIII)V",
 			at = @At(value = "INVOKE", target = "Lcom/mojang/blaze3d/platform/GlStateManager;_texParameter(IIF)V", #if MC_VER == MC_1_16_5 remap = true #else remap = false #endif))
 	private static void setLodBias(int target, int pname, float param)
@@ -27,5 +33,6 @@ public class MixinTextureUtil
 			GlStateManager._texParameter(target, pname, biasValue);
 		}
 	}
+	#endif
 	
 }

fabric/src/main/java/com/seibel/distanthorizons/fabric/mixins/server/MixinLevelTicks.java

@@ -1,55 +0,0 @@
-package com.seibel.distanthorizons.fabric.mixins.server;
-
-
-#if MC_VER < MC_1_21_3
-
-import net.minecraft.Util;
-import net.minecraft.world.entity.Entity;
-import org.spongepowered.asm.mixin.Mixin;
-
-/**
- * {@link MixinUtilBackgroundThread} was used for versions before 1.21.3
- * This is just a dummy class/mixin to make the compiler happy.
- *
- * @see MixinUtilBackgroundThread
- */
-//@Mixin(net.minecraft.minecraft.class) // TODO we should allow version specific mixins so we don't have to create dummy mixins that exist for all MC versions
-@Mixin(Util.class)
-public class MixinLevelTicks
-{
-	
-}
-#else
-
-import com.seibel.distanthorizons.common.wrappers.DependencySetupDoneCheck;
-
-import net.minecraft.world.ticks.LevelTicks;
-import net.minecraft.world.ticks.ScheduledTick;
-
-import org.spongepowered.asm.mixin.Mixin;
-import org.spongepowered.asm.mixin.injection.At;
-import org.spongepowered.asm.mixin.injection.Inject;
-import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
-
-@Mixin(LevelTicks.class)
-public class MixinLevelTicks<T>
-{
-	// TODO put in a common location
-	private static boolean isWorldGenThread()
-	{ return DependencySetupDoneCheck.isDone && DependencySetupDoneCheck.getIsCurrentThreadDistantGeneratorThread.get(); }
-	
-	
-	
-	@Inject(method = "schedule", at = @At(value = "HEAD"), cancellable = true)
-	private void schedule(ScheduledTick<T> tick, CallbackInfo ci)
-	{
-		// In MC 1.21.4 an error check was added to log attempting to schedule ticks for unloaded chunks
-		// this caused a lot of unnecessary errors when generating sand (FallingBlock.class).
-		if (isWorldGenThread())
-		{
-			ci.cancel();
-		}
-	}
-	
-}
-#endif

fabric/src/main/java/com/seibel/distanthorizons/fabric/testing/TestGenericWorldGenerator.java

@@ -46,8 +46,8 @@ public class TestGenericWorldGenerator implements IDhApiWorldGenerator
 	public byte getSmallestDataDetailLevel() { return (byte) (EDhApiDetailLevel.BLOCK.detailLevel); }
 	@Override
 	public byte getLargestDataDetailLevel() 
-	//{ return (byte) (EDhApiDetailLevel.BLOCK.detailLevel + 12); }
-	{ return (byte) (EDhApiDetailLevel.BLOCK.detailLevel); }
+	{ return (byte) (EDhApiDetailLevel.BLOCK.detailLevel + 12); }
+	//{ return (byte) (EDhApiDetailLevel.BLOCK.detailLevel); }
 	
 	
 	@Override
@@ -105,43 +105,43 @@ public class TestGenericWorldGenerator implements IDhApiWorldGenerator
 			{
 				case 0:
 					blockResourceLocation = "minecraft:red_wool";
-					maxHeight = 60;
+					maxHeight = 20;
 					break;
 				case 1:
 					blockResourceLocation = "minecraft:orange_wool";
-					maxHeight = 70;
+					maxHeight = 30;
 					break;
 				case 2:
 					blockResourceLocation = "minecraft:yellow_wool";
-					maxHeight = 80;
+					maxHeight = 40;
 					break;
 				case 3:
 					blockResourceLocation = "minecraft:lime_wool";
-					maxHeight = 90;
+					maxHeight = 50;
 					break;
 				case 4:
 					blockResourceLocation = "minecraft:cyan_wool";
-					maxHeight = 100;
+					maxHeight = 60;
 					break;
 				case 5:
 					blockResourceLocation = "minecraft:blue_wool";
-					maxHeight = 100;
+					maxHeight = 70;
 					break;
 				case 6:
 					blockResourceLocation = "minecraft:magenta_wool";
-					maxHeight = 110;
+					maxHeight = 80;
 					break;
 				case 7:
 					blockResourceLocation = "minecraft:white_wool";
-					maxHeight = 120;
+					maxHeight = 90;
 					break;
 				case 8:
 					blockResourceLocation = "minecraft:gray_wool";
-					maxHeight = 120;
+					maxHeight = 100;
 					break;
 				default:
 					blockResourceLocation = "minecraft:black_wool";
-					maxHeight = 140;
+					maxHeight = 110;
 					break;
 			}
 			

fabric/src/main/java/com/seibel/distanthorizons/fabric/testing/TestWorldGenBindingEvent.java

@@ -25,7 +25,7 @@ public class TestWorldGenBindingEvent extends DhApiLevelLoadEvent
 			ServerLevel level = (ServerLevel) event.value.levelWrapper.getWrappedMcObject();
 			
 			// override the core DH world generator for this level
-			//IDhApiWorldGenerator exampleWorldGen = new TestChunkWorldGenerator(level);
+			//IDhApiWorldGenerator exampleWorldGen = new TestChunkWorldGenerator(level); // TODO biomes are broken for some reason
 			IDhApiWorldGenerator exampleWorldGen = new TestGenericWorldGenerator(event.value.levelWrapper);
 			DhApi.worldGenOverrides.registerWorldGeneratorOverride(event.value.levelWrapper, exampleWorldGen);
 		}

fabric/src/main/java/com/seibel/distanthorizons/fabric/wrappers/modAccessor/SodiumAccessor.java

@@ -43,11 +43,22 @@ import net.minecraft.world.phys.AABB;
 
 public class SodiumAccessor implements ISodiumAccessor
 {
+	/**
+	 * True if sodium 0.5 or less is present. <br>
+	 * This field is public because it's also used to check if we need Indium to be present. <br>
+	 * We need Indium if Sodium 0.5 or less is present.
+	 */
+	public static final boolean isSodiumV5OrLess;
+	
 	#if MC_VER >= MC_1_20_1
 	private static MethodHandle setFogOcclusionMethod;
 	private static Object sodiumPerformanceOptions;
 	#endif
 	
+	static {
+		isSodiumV5OrLess = !classPresent("net.caffeinemc.mods.sodium.client.render.SodiumWorldRenderer");
+	}
+	
 	
 	
 	//======================//
@@ -72,8 +83,7 @@ public class SodiumAccessor implements ISodiumAccessor
 		{
 			if (sodiumPerformanceOptions == null)
 			{
-				boolean sodiumV6 = classPresent("net.caffeinemc.mods.sodium.client.render.SodiumWorldRenderer");
-				if (!sodiumV6)
+				if (isSodiumV5OrLess)
 				{
 					// sodium 0.5
 					

fabric/src/main/resources/DistantHorizons.fabric.mixins.json

@@ -8,8 +8,7 @@
     "server.MixinEntity",
     "server.MixinServerPlayer",
     "server.MixinTracingExecutor",
-    "server.MixinUtilBackgroundThread",
-    "server.MixinLevelTicks"
+    "server.MixinUtilBackgroundThread"
   ],
   "client": [
     "client.MixinClientLevel",

forge/src/main/java/com/seibel/distanthorizons/forge/ForgeClientProxy.java

@@ -24,13 +24,17 @@ import com.seibel.distanthorizons.common.util.ProxyUtil;
 import com.seibel.distanthorizons.common.wrappers.minecraft.MinecraftRenderWrapper;
 import com.seibel.distanthorizons.common.wrappers.world.ClientLevelWrapper;
 import com.seibel.distanthorizons.core.api.internal.ClientApi;
+import com.seibel.distanthorizons.core.api.internal.ServerApi;
 import com.seibel.distanthorizons.core.api.internal.SharedApi;
 import com.seibel.distanthorizons.core.dependencyInjection.SingletonInjector;
 import com.seibel.distanthorizons.core.logging.DhLoggerBuilder;
+import com.seibel.distanthorizons.core.network.messages.AbstractNetworkMessage;
 import com.seibel.distanthorizons.core.util.threading.ThreadPoolUtil;
 import com.seibel.distanthorizons.core.wrapperInterfaces.chunk.IChunkWrapper;
 
 import com.seibel.distanthorizons.core.wrapperInterfaces.minecraft.IMinecraftClientWrapper;
+import com.seibel.distanthorizons.core.wrapperInterfaces.misc.IPluginPacketSender;
+import com.seibel.distanthorizons.core.wrapperInterfaces.misc.IServerPlayerWrapper;
 import com.seibel.distanthorizons.core.wrapperInterfaces.world.IClientLevelWrapper;
 import com.seibel.distanthorizons.core.wrapperInterfaces.world.ILevelWrapper;
 import net.minecraft.world.level.LevelAccessor;
@@ -52,6 +56,7 @@ import net.minecraft.world.level.chunk.ChunkAccess;
 
 import net.minecraftforge.common.MinecraftForge;
 import org.apache.logging.log4j.Logger;
+import org.jetbrains.annotations.NotNull;
 import org.lwjgl.glfw.GLFW;
 
 import com.seibel.distanthorizons.common.wrappers.chunk.ChunkWrapper;
@@ -75,6 +80,7 @@ import java.util.concurrent.ThreadPoolExecutor;
 public class ForgeClientProxy implements AbstractModInitializer.IEventProxy
 {
 	private static final IMinecraftClientWrapper MC = SingletonInjector.INSTANCE.get(IMinecraftClientWrapper.class);
+	private static final ForgePluginPacketSender PACKET_SENDER = (ForgePluginPacketSender) SingletonInjector.INSTANCE.get(IPluginPacketSender.class);
 	private static final Logger LOGGER = DhLoggerBuilder.getLogger();
 	
 	
@@ -90,7 +96,13 @@ public class ForgeClientProxy implements AbstractModInitializer.IEventProxy
 	public void registerEvents()
 	{
 		MinecraftForge.EVENT_BUS.register(this);
-		ForgePluginPacketSender.setPacketHandler(ClientApi.INSTANCE::pluginMessageReceived);
+		
+		// handles singleplayer, LAN, and connecting to a server
+		PACKET_SENDER.setPacketHandler((IServerPlayerWrapper player, @NotNull AbstractNetworkMessage message) ->
+		{
+			ClientApi.INSTANCE.pluginMessageReceived(message);
+			ServerApi.INSTANCE.pluginMessageReceived(player, message);
+		});
 	}
 	
 	

forge/src/main/java/com/seibel/distanthorizons/forge/ForgePluginPacketSender.java

@@ -45,16 +45,18 @@ public class ForgePluginPacketSender extends AbstractPluginPacketSender
 			);
 			#endif
 	
-	public static void setPacketHandler(Consumer<AbstractNetworkMessage> consumer)
+	public ForgePluginPacketSender() { super(true); }
+	
+	public void setPacketHandler(Consumer<AbstractNetworkMessage> consumer)
 	{
-		setPacketHandler((player, message) -> consumer.accept(message));
+		this.setPacketHandler((player, message) -> consumer.accept(message));
 	}
-	public static void setPacketHandler(BiConsumer<IServerPlayerWrapper, AbstractNetworkMessage> consumer)
+	public void setPacketHandler(BiConsumer<IServerPlayerWrapper, AbstractNetworkMessage> consumer)
 	{
 		#if MC_VER >= MC_1_20_2
 		PLUGIN_CHANNEL.messageBuilder(MessageWrapper.class, 0)
-				.encoder((wrapper, out) -> AbstractPluginPacketSender.encodeMessage(out, wrapper.message))
-				.decoder(in -> new MessageWrapper(AbstractPluginPacketSender.decodeMessage(in)))
+				.encoder((wrapper, out) -> this.encodeMessage(out, wrapper.message))
+				.decoder(in -> new MessageWrapper(this.decodeMessage(in)))
 				.consumerNetworkThread((wrapper, context) ->
 				{
 					if (wrapper.message != null)
@@ -73,8 +75,8 @@ public class ForgePluginPacketSender extends AbstractPluginPacketSender
 				.add();
 		#else // < 1.20.2
 		PLUGIN_CHANNEL.registerMessage(0, MessageWrapper.class,
-				(wrapper, out) -> AbstractPluginPacketSender.encodeMessage(out, wrapper.message),
-				in -> new MessageWrapper(AbstractPluginPacketSender.decodeMessage(in)),
+				(wrapper, out) -> this.encodeMessage(out, wrapper.message),
+				in -> new MessageWrapper(this.decodeMessage(in)),
 				(wrapper, context) ->
 				{
 					if (wrapper.message != null)

forge/src/main/java/com/seibel/distanthorizons/forge/ForgeServerProxy.java

@@ -7,7 +7,9 @@ import com.seibel.distanthorizons.common.wrappers.misc.ServerPlayerWrapper;
 import com.seibel.distanthorizons.common.wrappers.world.ServerLevelWrapper;
 import com.seibel.distanthorizons.common.wrappers.worldGeneration.BatchGenerationEnvironment;
 import com.seibel.distanthorizons.core.api.internal.ServerApi;
+import com.seibel.distanthorizons.core.dependencyInjection.SingletonInjector;
 import com.seibel.distanthorizons.core.wrapperInterfaces.chunk.IChunkWrapper;
+import com.seibel.distanthorizons.core.wrapperInterfaces.misc.IPluginPacketSender;
 import com.seibel.distanthorizons.core.wrapperInterfaces.world.ILevelWrapper;
 import net.minecraft.resources.ResourceKey;
 import net.minecraft.server.level.ServerLevel;
@@ -51,6 +53,8 @@ import java.util.function.Supplier;
 
 public class ForgeServerProxy implements AbstractModInitializer.IEventProxy
 {
+	private static final ForgePluginPacketSender PACKET_SENDER = (ForgePluginPacketSender) SingletonInjector.INSTANCE.get(IPluginPacketSender.class);
+
 	#if MC_VER < MC_1_19_2
 	private static LevelAccessor GetEventLevel(WorldEvent e) { return e.getWorld(); }
 	#else
@@ -68,7 +72,7 @@ public class ForgeServerProxy implements AbstractModInitializer.IEventProxy
 		MinecraftForge.EVENT_BUS.register(this);
 		if (this.isDedicated)
 		{
-			ForgePluginPacketSender.setPacketHandler(ServerApi.INSTANCE::pluginMessageReceived);
+			PACKET_SENDER.setPacketHandler(ServerApi.INSTANCE::pluginMessageReceived);
 		}
 	}
 	
@@ -78,10 +82,7 @@ public class ForgeServerProxy implements AbstractModInitializer.IEventProxy
 	// constructor //
 	//=============//
 	
-	public ForgeServerProxy(boolean isDedicated)
-	{
-		this.isDedicated = isDedicated;
-	}
+	public ForgeServerProxy(boolean isDedicated) { this.isDedicated = isDedicated; }
 	
 	
 	

forge/src/main/java/com/seibel/distanthorizons/forge/mixins/client/MixinMinecraft.java

@@ -57,15 +57,25 @@ public class MixinMinecraft
 		
 		if (SelfUpdater.onStart())
 		{
-			instance.setScreen(new UpdateModScreen(
-					new TitleScreen(false), // We don't want to use the vanilla title screen as it would fade the buttons
-					(Config.Client.Advanced.AutoUpdater.updateBranch.get() == EDhApiUpdateBranch.STABLE ? ModrinthGetter.getLatestIDForVersion(SingletonInjector.INSTANCE.get(IVersionConstants.class).getMinecraftVersion()): GitlabGetter.INSTANCE.projectPipelines.get(0).get("sha"))
-			));
-		}
-		else
-		{
-			instance.setScreen(guiScreen); // Sets the screen back to the vanilla screen as if nothing ever happened
+			try
+			{
+				instance.setScreen(new UpdateModScreen(
+						new TitleScreen(false), // We don't want to use the vanilla title screen as it would fade the buttons
+						(Config.Client.Advanced.AutoUpdater.updateBranch.get() == EDhApiUpdateBranch.STABLE ? ModrinthGetter.getLatestIDForVersion(SingletonInjector.INSTANCE.get(IVersionConstants.class).getMinecraftVersion()): GitlabGetter.INSTANCE.projectPipelines.get(0).get("sha"))
+				));
+				return;
+			}
+			catch (Exception e)
+			{
+				// info instead of error since this can be ignored and probably just means
+				// there isn't a new DH version available
+				LOGGER.info("Unable to show DH update screen, reason: ["+e.getMessage()+"].");
+			}
 		}
+		
+		// Sets the screen back to the vanilla screen as if nothing ever happened
+		// if not done the game will crash
+		instance.setScreen(guiScreen);
 	}
 	#endif
 	
@@ -108,7 +118,7 @@ public class MixinMinecraft
 								versionId
 						));
 					}
-					catch (IllegalArgumentException e)
+					catch (Exception e)
 					{
 						// info instead of error since this can be ignored and probably just means
 						// there isn't a new DH version available

gradle.properties

@@ -5,7 +5,7 @@ org.gradle.caching=true
 
 # Mod Info
 mod_name=DistantHorizons
-mod_version=2.3.0-b-dev
+mod_version=2.3.3-b-dev
 api_version=4.0.0
 maven_group=com.seibel.distanthorizons
 mod_readable_name=Distant Horizons
@@ -23,9 +23,9 @@ manifold_version=2024.1.37
 nightconfig_version=3.6.6
 lz4_version=1.8.0
 xz_version=1.9
+# Before updating, read relocate_natives/README.md
 sqlite_jdbc_version=3.47.2.0
 # 8.2.1 is the newest version we can use since that's the version MC 1.16.5 uses 
-# (at least until we can fix the gradle script so core and main can use/shade different fastutil versions)
 fastutil_version=8.2.1
 #svgSalamander_version=1.1.3
 
@@ -48,10 +48,11 @@ infoBuildSource=User
 
 # Internal Properties (These are set at runtime for Forgix to merge jar's)
 versionStr=
+mergeVersions=
 
 # This defines what MC version Intellij will use for the preprocessor
 # and what version is used automatically by build and run commands
-mcVer=1.21.4
+mcVer=1.21.5
 
 # Defines the maximum amount of memory Minecraft is allowed when run in a development environment
 #minecraftMemoryJavaArg="-Xmx4G"

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.10-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.12-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME

neoforge/src/main/java/com/seibel/distanthorizons/neoforge/NeoforgeMain.java

@@ -26,7 +26,9 @@ import com.seibel.distanthorizons.core.api.internal.ClientApi;
 import com.seibel.distanthorizons.core.config.Config;
 import com.seibel.distanthorizons.core.api.internal.ServerApi;
 import com.seibel.distanthorizons.core.dependencyInjection.SingletonInjector;
+import com.seibel.distanthorizons.core.network.messages.AbstractNetworkMessage;
 import com.seibel.distanthorizons.core.wrapperInterfaces.misc.IPluginPacketSender;
+import com.seibel.distanthorizons.core.wrapperInterfaces.misc.IServerPlayerWrapper;
 import com.seibel.distanthorizons.core.wrapperInterfaces.modAccessor.IModChecker;
 import com.seibel.distanthorizons.core.wrapperInterfaces.modAccessor.IOptifineAccessor;
 import com.seibel.distanthorizons.coreapi.ModInfo;
@@ -51,6 +53,7 @@ import java.util.function.Consumer;
 import net.neoforged.neoforge.client.ConfigScreenHandler;
 #else
 import net.neoforged.neoforge.client.gui.IConfigScreenFactory;
+import org.jetbrains.annotations.NotNull;
 #endif
 
 /**
@@ -64,11 +67,16 @@ public class NeoforgeMain extends AbstractModInitializer
 {
 	public NeoforgeMain(IEventBus eventBus)
 	{
-		eventBus.addListener((FMLClientSetupEvent e) -> {
+		// handles singleplayer, LAN, and connecting to a server
+		eventBus.addListener((FMLClientSetupEvent e) -> 
+		{
 			this.onInitializeClient();
-			eventBus.addListener(this::registerNetworkingClient);
+			eventBus.addListener(this::registerNetworkingClientServer);
 		});
-		eventBus.addListener((FMLDedicatedServerSetupEvent e) -> {
+		
+		// handles dedicated servers
+		eventBus.addListener((FMLDedicatedServerSetupEvent e) -> 
+		{
 			this.onInitializeServer();
 			eventBus.addListener(this::registerNetworkingServer);
 		});
@@ -79,13 +87,22 @@ public class NeoforgeMain extends AbstractModInitializer
 	//============//
 	// networking //
 	//============//
-	public void registerNetworkingClient(RegisterPayloadHandlersEvent event)
-	{ NeoforgePluginPacketSender.setPacketHandler(event, ClientApi.INSTANCE::pluginMessageReceived); }
+	
+	public void registerNetworkingClientServer(RegisterPayloadHandlersEvent event)
+	{ 
+		NeoforgePluginPacketSender.setPacketHandler(event, (IServerPlayerWrapper player, @NotNull AbstractNetworkMessage message) -> 
+		{
+			ClientApi.INSTANCE.pluginMessageReceived(message);
+			ServerApi.INSTANCE.pluginMessageReceived(player, message);
+		}); 
+	}
 	public void registerNetworkingServer(RegisterPayloadHandlersEvent event)
 	{ NeoforgePluginPacketSender.setPacketHandler(event, ServerApi.INSTANCE::pluginMessageReceived); }
 	
 	
 	
+	
+	
 	@Override
 	protected IEventProxy createServerProxy(boolean isDedicated) { return new NeoforgeServerProxy(isDedicated); }
 	

neoforge/src/main/java/com/seibel/distanthorizons/neoforge/mixins/client/MixinLightTexture.java

@@ -19,17 +19,12 @@
 
 package com.seibel.distanthorizons.neoforge.mixins.client;
 
-
-import com.mojang.blaze3d.pipeline.TextureTarget;
-import com.mojang.blaze3d.platform.NativeImage;
-
 import com.seibel.distanthorizons.common.wrappers.minecraft.MinecraftRenderWrapper;
 import com.seibel.distanthorizons.core.dependencyInjection.SingletonInjector;
 import com.seibel.distanthorizons.core.wrapperInterfaces.minecraft.IMinecraftClientWrapper;
 import com.seibel.distanthorizons.core.wrapperInterfaces.world.IClientLevelWrapper;
 import net.minecraft.client.renderer.LightTexture;
 
-import org.lwjgl.opengl.GL32;
 import org.spongepowered.asm.mixin.Final;
 import org.spongepowered.asm.mixin.Mixin;
 import org.spongepowered.asm.mixin.Shadow;
@@ -37,30 +32,33 @@ import org.spongepowered.asm.mixin.injection.At;
 import org.spongepowered.asm.mixin.injection.Inject;
 import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
 
+#if MC_VER < MC_1_21_3
+import com.mojang.blaze3d.platform.NativeImage;
+#elif MC_VER < MC_1_21_5
+import com.mojang.blaze3d.pipeline.TextureTarget;
+#else
+import com.mojang.blaze3d.opengl.GlTexture;
+import com.mojang.blaze3d.systems.RenderSystem;
+import com.mojang.blaze3d.textures.GpuTexture;
+#endif
+
 @Mixin(LightTexture.class)
 public class MixinLightTexture
 {
 	#if MC_VER < MC_1_21_3
-	@Shadow
+	@Shadow 
 	@Final
 	private NativeImage lightPixels;
-	
-	
-	@Inject(method = "updateLightTexture(F)V", at = @At("RETURN"))
-	public void updateLightTexture(float partialTicks, CallbackInfo ci)
-	{
-		IMinecraftClientWrapper mc = SingletonInjector.INSTANCE.get(IMinecraftClientWrapper.class);
-		if (mc == null || mc.getWrappedClientLevel() == null)
-		{
-			return;
-		}
-		
-		IClientLevelWrapper clientLevel = mc.getWrappedClientLevel();
-		MinecraftRenderWrapper.INSTANCE.updateLightmap(this.lightPixels, clientLevel);
-	}
+	#elif MC_VER < MC_1_21_5
+	@Shadow
+	@Final
+	private TextureTarget target;
 	#else
+	@Shadow
+	@Final
+	private GpuTexture texture;
+	#endif
 	
-	@Shadow @Final private TextureTarget target;
 	@Inject(method = "updateLightTexture(F)V", at = @At("RETURN"))
 	public void updateLightTexture(float partialTicks, CallbackInfo ci)
 	{
@@ -70,9 +68,17 @@ public class MixinLightTexture
 			return;
 		}
 		
+		
 		IClientLevelWrapper clientLevel = mc.getWrappedClientLevel();
+		
+		#if MC_VER < MC_1_21_3
+		MinecraftRenderWrapper.INSTANCE.updateLightmap(this.lightPixels, clientLevel);
+		#elif MC_VER < MC_1_21_5
 		MinecraftRenderWrapper.INSTANCE.setLightmapId(this.target.getColorTextureId(), clientLevel);
+		#else
+		GlTexture glTexture = (GlTexture) this.texture;
+		MinecraftRenderWrapper.INSTANCE.setLightmapId(glTexture.glId(), clientLevel);
+		#endif
 	}
 	
-	#endif
 }

neoforge/src/main/java/com/seibel/distanthorizons/neoforge/mixins/client/MixinMinecraft.java

@@ -76,14 +76,13 @@ public class MixinMinecraft
 				{
 					try
 					{
-						
 						Minecraft.getInstance().setScreen(new UpdateModScreen(
 								// TODO: Change to runnable, instead of tittle screen
 								new TitleScreen(false), // We don't want to use the vanilla title screen as it would fade the buttons
 								versionId
 						));
 					}
-					catch (IllegalArgumentException e)
+					catch (Exception e)
 					{
 						// info instead of error since this can be ignored and probably just means
 						// there isn't a new DH version available

neoforge/src/main/java/com/seibel/distanthorizons/neoforge/mixins/client/MixinTextureUtil.java

@@ -1,6 +1,8 @@
 package com.seibel.distanthorizons.neoforge.mixins.client;
 
+#if MC_VER < MC_1_21_5
 import com.mojang.blaze3d.platform.GlStateManager;
+#endif
 import com.mojang.blaze3d.platform.TextureUtil;
 import com.seibel.distanthorizons.core.config.Config;
 import org.spongepowered.asm.mixin.Mixin;
@@ -15,6 +17,9 @@ import org.spongepowered.asm.mixin.injection.Redirect;
 @Mixin(TextureUtil.class)
 public class MixinTextureUtil
 {
+	// TODO fix for MC 1.21.5+
+	
+	#if MC_VER < MC_1_21_5
 	@Redirect(method = "prepareImage(Lcom/mojang/blaze3d/platform/NativeImage$InternalGlFormat;IIII)V",
 			at = @At(value = "INVOKE", target = "Lcom/mojang/blaze3d/platform/GlStateManager;_texParameter(IIF)V"), remap = false)
 	private static void setLodBias(int target, int pname, float param)
@@ -27,5 +32,6 @@ public class MixinTextureUtil
 			GlStateManager._texParameter(target, pname, biasValue);
 		}
 	}
+	#endif
 	
 }

neoforge/src/main/java/com/seibel/distanthorizons/neoforge/mixins/server/MixinLevelTicks.java

@@ -1,53 +0,0 @@
-package com.seibel.distanthorizons.neoforge.mixins.server;
-
-
-#if MC_VER < MC_1_21_3
-
-import net.minecraft.Util;
-import org.spongepowered.asm.mixin.Mixin;
-
-/**
- * {@link MixinUtilBackgroundThread} was used for versions before 1.21.3
- * This is just a dummy class/mixin to make the compiler happy.
- *
- * @see MixinUtilBackgroundThread
- */
-@Mixin(Util.class) // TODO we should allow version specific mixins so we don't have to create dummy mixins that exist for all MC versions
-public class MixinLevelTicks<T>
-{
-	
-}
-#else
-
-import com.seibel.distanthorizons.common.wrappers.DependencySetupDoneCheck;
-
-import net.minecraft.world.ticks.LevelTicks;
-import net.minecraft.world.ticks.ScheduledTick;
-
-import org.spongepowered.asm.mixin.Mixin;
-import org.spongepowered.asm.mixin.injection.At;
-import org.spongepowered.asm.mixin.injection.Inject;
-import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
-
-@Mixin(LevelTicks.class)
-public class MixinLevelTicks<T>
-{
-	// TODO put in a common location
-	private static boolean isWorldGenThread()
-	{ return DependencySetupDoneCheck.isDone && DependencySetupDoneCheck.getIsCurrentThreadDistantGeneratorThread.get(); }
-	
-	
-	
-	@Inject(method = "schedule", at = @At(value = "HEAD"), cancellable = true)
-	private void schedule(ScheduledTick<T> tick, CallbackInfo ci)
-	{
-		// In MC 1.21.4 an error check was added to log attempting to schedule ticks for unloaded chunks
-		// this caused a lot of unnecessary errors when generating sand (FallingBlock.class).
-		if (isWorldGenThread())
-		{
-			ci.cancel();
-		}
-	}
-	
-}
-#endif

neoforge/src/main/resources/DistantHorizons.neoforge.mixins.json

@@ -8,8 +8,7 @@
     "server.MixinServerPlayer",
     "server.MixinTFChunkGenerator",
     "server.MixinTracingExecutor",
-    "server.MixinUtilBackgroundThread",
-    "server.MixinLevelTicks"
+    "server.MixinUtilBackgroundThread"
   ],
   "client": [
     "client.MixinClientPacketListener",

relocate_natives/README.md

@@ -0,0 +1,46 @@
+This directory contains the native files of libraries that were modified for relocation. They will be copied from here during the normal build steps.
+
+Before adding/updating a library, make sure you have Python 3.8+ installed and check the instructions below.
+
+How to add a library's natives:
+
+1. In `build.gradle`:
+
+- Make sure the target package is the same length or shorter (untested) than the source package. Underscores in native methods will be mapped to `_1` so account for that as well.
+- Exclude the native files and add them as `relocateNative` (see example).
+
+Example:
+
+```groovy
+relocate "org.sqlite", "dh_sqlite", {
+    exclude "org/sqlite/native/**"
+}
+
+transform(NativeTransformer) {
+    // NativeTransformer configuration
+    rootDir = project.rootDir
+
+    // Replace native strings, e.g. used in calls back to Java
+    relocateNative "org/sqlite", "dh_sqlite"
+    // Rename native methods used when calling from Java
+    relocateNative "org_sqlite", "dh_1sqlite"
+}
+```
+
+How to update a library's natives:
+
+1. Delete the library's folder in cache/.
+2. It will repopulate during the next build.
+
+Why does this step exist?
+
+- Native files are not handled by the shadow plugin correctly.
+- I preferred it as a more streamlined approach, although a bit hacky.
+- Possible alternatives:
+    - Use edited libraries' source code: although more straightforward, it requires maintaining and updating the repositories for the libraries being added
+    - Interfacing with the necessary libraries directly: an absolute mess for technical reasons
+
+What are libraries used?
+
+- LIEF: for fixing binaries after replacing strings
+- apple-codesign: for re-signing Mac binaries, since their signatures get invalidated after previous steps

relocate_natives/download_codesign.py

@@ -0,0 +1,110 @@
+import os
+import platform
+import requests
+import tarfile
+import zipfile
+from pathlib import Path
+
+
+def get_platform_specific_filename():
+    system = platform.system()
+    machine = platform.machine()
+
+    if system == "Darwin":
+        if machine == "arm64":
+            return "apple-codesign-*-aarch64-apple-darwin.tar.gz"
+        else:
+            return "apple-codesign-*-x86_64-apple-darwin.tar.gz"
+    elif system == "Linux":
+        if machine == "aarch64":
+            return "apple-codesign-*-aarch64-unknown-linux-musl.tar.gz"
+        else:
+            return "apple-codesign-*-x86_64-unknown-linux-musl.tar.gz"
+    elif system == "Windows":
+        if machine.endswith("64"):
+            return "apple-codesign-*-x86_64-pc-windows-msvc.zip"
+        else:
+            return "apple-codesign-*-i686-pc-windows-msvc.zip"
+    else:
+        raise Exception(f"Unsupported platform: {system} {machine}")
+
+
+def download_and_unpack():
+    dest_dir = Path("./apple-codesign")
+
+    repo_url = "https://api.github.com/repos/indygreg/apple-platform-rs/releases/latest"
+    dest_dir.mkdir(exist_ok=True)
+
+    # Fetch the latest release info from GitHub
+    print("Fetching latest release information...")
+    response = requests.get(repo_url)
+    response.raise_for_status()
+    release_data = response.json()
+
+    # Ensure release data has assets
+    if "assets" not in release_data:
+        raise Exception("Release data does not contain assets.")
+
+    # Determine the correct asset
+    platform_filename = get_platform_specific_filename()
+    asset = next((asset for asset in release_data["assets"] if asset["name"].startswith("apple-codesign-") and asset["name"].endswith(platform_filename.split("*")[-1])), None)
+
+    if not asset:
+        raise Exception(f"No matching asset found for platform: {platform_filename}")
+
+    # Download the archive
+    print(f"Downloading {asset['name']}...")
+    download_url = asset["browser_download_url"]
+    archive_path = dest_dir / asset["name"]
+
+    with requests.get(download_url, stream=True) as r:
+        r.raise_for_status()
+        with open(archive_path, "wb") as f:
+            for chunk in r.iter_content(chunk_size=8192):
+                f.write(chunk)
+
+    print(f"Downloaded to {archive_path}")
+
+    # Extract the archive
+    print("Extracting archive...")
+    temp_extract_dir = dest_dir / "temp_extract"
+    temp_extract_dir.mkdir(parents=True, exist_ok=True)
+
+    if archive_path.suffix == ".zip":
+        with zipfile.ZipFile(archive_path, "r") as zip_ref:
+            zip_ref.extractall(temp_extract_dir)
+    elif archive_path.suffixes[-2:] == [".tar", ".gz"]:
+        with tarfile.open(archive_path, "r:gz") as tar_ref:
+            tar_ref.extractall(temp_extract_dir)
+    else:
+        raise Exception(f"Unknown archive format: {archive_path}")
+
+    # Move contents of the root directory inside the archive to dest_dir
+    root_dir = next(temp_extract_dir.iterdir())  # Assuming only one root directory
+    for item in root_dir.iterdir():
+        target_path = dest_dir / item.name
+        if target_path.exists():
+            if target_path.is_dir():
+                os.rmdir(target_path)
+            else:
+                os.remove(target_path)
+        item.rename(target_path)
+
+    # Clean up temporary directories
+    for item in temp_extract_dir.iterdir():
+        if item.is_dir():
+            os.rmdir(item)
+    temp_extract_dir.rmdir()
+
+    print(f"Extracted to {dest_dir}")
+
+    # Clean up the archive
+    os.remove(archive_path)
+    print(f"Removed archive {archive_path}")
+
+
+if __name__ == "__main__":
+    try:
+        download_and_unpack()
+    except Exception as e:
+        print(f"Error: {e}")

relocate_natives/fix_modified_binary.py

@@ -0,0 +1,31 @@
+import sys
+import lief
+import subprocess
+import download_codesign
+from pathlib import Path
+
+# Parse the input binary & xit if binary is invalid
+output_path = sys.argv[1]
+binary = lief.parse(sys.stdin.buffer.read())
+if binary is None:
+    exit(1)
+
+# Remove signature from Mac binaries
+if isinstance(binary, lief.MachO.Binary):
+    binary.remove_signature()
+
+# Write the modified binary to the output path
+binary.write(output_path)
+
+# Sign Mac binaries (required to make them usable because apple)
+if isinstance(binary, lief.MachO.Binary):
+    print(f"Signing {output_path}...")
+
+    # Check if the Apple code-signing files are available, if not, download them
+    if not Path("./apple-codesign/COPYING").exists():
+        download_codesign.download_and_unpack()
+
+    # Run the code-signing process
+    sign_process = subprocess.Popen(["./apple-codesign/rcodesign", "sign", output_path], shell=False,
+                                    stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    sign_process.wait()

relocate_natives/prepare.ps1

@@ -0,0 +1,5 @@
+$ErrorActionPreference = "Stop"
+
+python -m venv .venv
+.\.venv\Scripts\activate
+pip install -r requirements.txt

relocate_natives/prepare.sh

@@ -0,0 +1,7 @@
+#!/bin/sh
+
+set -e
+
+python -m venv .venv
+. ./.venv/bin/activate
+pip install -r requirements.txt

settings.gradle

@@ -58,7 +58,7 @@ If you still need help with compiling, please read the Readme.md
 
 
 
-/** Loads the VersionProperties fiel for the currently selected Minecraft version. */
+/** Loads the VersionProperties field for the currently selected Minecraft version. */
 def loadProperties() {
     def defaultMcVersion = "1.20.1" // 1.20.1 is our current most stable version so we use that if no version was defined
 

versionProperties/1.21.1.properties

@@ -12,7 +12,7 @@ netty_version=4.1.97.Final
 
 # Fabric loader
 fabric_loader_version=0.16.9
-fabric_api_version=0.107.0+1.21.1
+fabric_api_version=0.115.0+1.21.1
     # Fabric mod versions
     modmenu_version=11.0.0-beta.1
     starlight_version_fabric=

versionProperties/1.21.5.properties

@@ -0,0 +1,56 @@
+# 1.21.4 version
+java_version=21
+minecraft_version=1.21.5
+parchment_version=1.21:2024.07.28
+compatible_minecraft_versions=["1.21.5"]
+accessWidenerVersion=1_21_4
+builds_for=fabric,neoforge
+# forge is broken due to gradle/build script issues
+
+# Netty
+netty_version=4.1.97.Final
+
+# Fabric loader
+fabric_loader_version=0.16.10
+fabric_api_version=0.119.5+1.21.5
+    modmenu_version=14.0.0-rc.2
+    starlight_version_fabric=
+    phosphor_version_fabric=
+    lithium_version=
+    sodium_version=mc1.21.5-0.6.11-fabric
+    iris_version=1.8.10+1.21.5-fabric
+    bclib_version=
+    immersive_portals_version=
+    canvas_version=
+    
+    # some versions of 1.8.11 nightly builds may not work, but the ones after 2025-03-30 should
+    fabric_incompatibility_list={ "iris": "<=1.8.10" }
+    fabric_recommend_list={}
+    
+    # Fabric mod run
+    # 0 = Don't enable and don't run
+    # 1 = Can be referenced in code but doesn't run
+    # 2 = Can be referenced in code and runs in client
+    enable_starlight=0
+    enable_phosphor=0
+    enable_sodium=1
+    enable_lithium=0
+    enable_iris=1
+    enable_bclib=0
+    enable_immersive_portals=0
+    enable_canvas=0
+
+# (Neo)Forge loader
+forge_version=
+neoforge_version=21.5.0-beta
+    # (Neo)Forge mod versions
+    starlight_version_forge=
+    terraforged_version=
+
+    # (Neo)Forge mod run
+    # 0 = Don't enable and don't run
+    # 1 = Can be referenced in code but doesn't run
+    # 2 = Can be referenced in code and runs in client
+    enable_starlight_forge=0
+    enable_terraforged=0
+    enable_terrafirmacraft=0