Up version 2.1.1-dev -> 2.1.2

won't require any lod regeneration since the decompressor is the same

.gitlab-ci.yml

@@ -30,7 +30,7 @@ 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"]
+      - 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"]
   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/;

build.gradle

@@ -54,7 +54,7 @@ def writeBuildGradlePredefine(List<String> mcVers, int mcIndex)
 // Transfers the values set in settings.gradle to the rest of the project
 project.gradle.ext.getProperties().each { prop ->
     rootProject.ext.set(prop.key, prop.value)
-//    println "Added prop [key:" + prop.key + ", value:" + prop.value + "]"
+    //println "Added prop [key:" + prop.key + ", value:" + prop.value + "]"
 }
 // Sets up manifold stuff
 writeBuildGradlePredefine(rootProject.mcVers, rootProject.mcIndex)
@@ -106,11 +106,12 @@ subprojects { p ->
         apply plugin: "systems.manifold.manifold-gradle-plugin"
     
     // Apply forge's loom
-    if (
-            (findProject(":forge") && p == project(":forge")) ||
-                    (findProject(":neoforge") && p == project(":neoforge"))
-    )
-    apply plugin: "dev.architectury.loom"
+    if ((findProject(":forge") && p == project(":forge")) ||
+        (findProject(":neoforge") && p == project(":neoforge"))
+        )
+    {
+        apply plugin: "dev.architectury.loom"
+    }
 
 
     // Set the manifold version (may not be required tough)
@@ -430,9 +431,11 @@ subprojects { p ->
     jar {
         from "LICENSE.txt"
         manifest {
-            attributes 'Implementation-Title': rootProject.mod_name,
-                    'Implementation-Version': rootProject.mod_version,
-                    'Main-Class': 'com.seibel.distanthorizons.core.jar.JarMain' // When changing the main of the jar change this line
+            attributes( 
+                'Implementation-Title': rootProject.mod_name,
+                'Implementation-Version': rootProject.mod_version,
+                'Main-Class': 'com.seibel.distanthorizons.core.jar.JarMain' // When changing the main of the jar change this line
+            )
         }
     }
 
@@ -521,15 +524,17 @@ allprojects { p ->
             }
         }
 
-        // Required for ModMenu
-        maven { url "https://maven.terraformersmc.com/" }
-
-        // Required for Mixins & VanillaGradle
+        // VanillaGradle and Mixins in common
         maven { url "https://repo.spongepowered.org/maven/" }
 
-        // Required for Canvas (mod)
+        // Canvas mod
         maven { url "https://maven.vram.io/" }
+        // ModMenu mod
+        maven { url "https://maven.terraformersmc.com/" }
 
+        // neoforge
+        maven { url "https://maven.neoforged.net/releases/" }
+        
         // These 3 are for importing mods that arnt on CursedForge, Modrinth, GitHub, GitLab or anywhere opensource
         flatDir {
             dirs "${rootDir}/mods/fabric"

common/build.gradle

@@ -1,4 +1,13 @@
 
+// temporary fix for broken spongepowered version
+buildscript {
+    configurations.configureEach {
+        resolutionStrategy {
+            force 'org.spongepowered:vanillagradle:0.2.1-20240507.024226-82'
+        }
+    }
+}
+
 plugins {
     id "org.spongepowered.gradle.vanilla" version "0.2.1-SNAPSHOT"
 }

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

@@ -130,7 +130,7 @@ public class WrapperFactory implements IWrapperFactory
 			}
 		}
 		
-		#if MC_VER <= MC_1_20_6
+		#if MC_VER <= MC_1_21
 		else if (objectArray.length == 2)
 		{
 			// correct number of parameters from the API
@@ -195,7 +195,7 @@ public class WrapperFactory implements IWrapperFactory
 	{
 		String[] expectedClassNames;
 		
-		#if MC_VER <= MC_1_20_6
+		#if MC_VER <= MC_1_21
 		expectedClassNames = new String[] 
 		{
 			ChunkAccess.class.getName(),
@@ -243,7 +243,7 @@ public class WrapperFactory implements IWrapperFactory
 		
 		Biome biome = (Biome) objectArray[0];
 		return BiomeWrapper.getBiomeWrapper(biome, coreLevelWrapper);
-		#elif MC_VER <= MC_1_20_6
+		#elif MC_VER <= MC_1_21
 		if (!(objectArray[0] instanceof Holder) || !(((Holder<?>) objectArray[0]).value() instanceof Biome))
 		{
 			throw new ClassCastException(createBiomeWrapperErrorMessage(objectArray));
@@ -266,7 +266,7 @@ public class WrapperFactory implements IWrapperFactory
 		
 		#if MC_VER < MC_1_18_2
 		expectedClassNames = new String[] { Biome.class.getName() };
-		#elif MC_VER <= MC_1_20_6
+		#elif MC_VER <= MC_1_21
 		expectedClassNames = new String[] { Holder.class.getName()+"<"+Biome.class.getName()+">" };
 		#else
 			// See preprocessor comment in createChunkWrapper() for full documentation
@@ -287,7 +287,7 @@ public class WrapperFactory implements IWrapperFactory
 		
 		
 		
-		#if MC_VER <= MC_1_20_6
+		#if MC_VER <= MC_1_21
 		if (objectArray.length != 1)
 		{
 			throw new ClassCastException(createBlockStateWrapperErrorMessage(objectArray));
@@ -314,7 +314,7 @@ public class WrapperFactory implements IWrapperFactory
 		
 		#if MC_VER == MC_1_16_5 || MC_VER == MC_1_17_1
 		expectedClassNames = new String[] { Biome.class.getName() };
-		#elif MC_VER <= MC_1_20_6
+		#elif MC_VER <= MC_1_21
 		expectedClassNames = new String[] { Holder.class.getName()+"<"+Biome.class.getName()+">" };
 		#else
 		// See preprocessor comment in createChunkWrapper() for full documentation

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

@@ -293,7 +293,11 @@ public class BiomeWrapper implements IBiomeWrapper
 			ResourceLocation resourceLocation;
 			try
 			{
+				#if MC_VER < MC_1_21
 				resourceLocation = new ResourceLocation(resourceLocationString.substring(0, separatorIndex), resourceLocationString.substring(separatorIndex + 1));
+				#else
+				resourceLocation = ResourceLocation.fromNamespaceAndPath(resourceLocationString.substring(0, separatorIndex), resourceLocationString.substring(separatorIndex + 1));
+				#endif
 			}
 			catch (Exception e)
 			{

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

@@ -380,7 +380,11 @@ public class BlockStateWrapper implements IBlockStateWrapper
 			ResourceLocation resourceLocation;
 			try
 			{
+				#if MC_VER < MC_1_21
 				resourceLocation = new ResourceLocation(resourceStateString.substring(0, separatorIndex), resourceStateString.substring(separatorIndex + 1));
+				#else
+				resourceLocation = ResourceLocation.fromNamespaceAndPath(resourceStateString.substring(0, separatorIndex), resourceStateString.substring(separatorIndex + 1));
+				#endif
 			}
 			catch (Exception e)
 			{

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

@@ -1,239 +0,0 @@
-/*
- *    This file is part of the Distant Horizons mod
- *    licensed under the GNU LGPL v3 License.
- *
- *    Copyright (C) 2020-2023 James Seibel
- *
- *    This program is free software: you can redistribute it and/or modify
- *    it under the terms of the GNU Lesser General Public License as published by
- *    the Free Software Foundation, version 3.
- *
- *    This program is distributed in the hope that it will be useful,
- *    but WITHOUT ANY WARRANTY; without even the implied warranty of
- *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *    GNU Lesser General Public License for more details.
- *
- *    You should have received a copy of the GNU Lesser General Public License
- *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-
-package com.seibel.distanthorizons.common.wrappers.chunk;
-
-import com.seibel.distanthorizons.coreapi.util.BitShiftUtil;
-
-import java.util.ArrayList;
-import java.util.Arrays;
-
-/**
- * Compact, efficient storage for light levels. 
- * all blocks only take up 4 bits in total, 
- * and if a 16x16x16 area is detected to have the same light level in all positions,
- * then we store a single byte for that light level, instead of 2 kilobytes.
- * 
- * @author Builderb0y
-*/
-public class ChunkLightStorage 
-{
-	/** the minimum Y level in the chunk which this storage is storing light levels for (inclusive). */
-	public int minY;
-	/** the maximum Y level in the chunk which this storage is storing light levels for (exclusive). */
-	public int maxY;
-	
-	/** the data stored in this storage, split up into 16x16x16 areas. */
-	public LightSection[] lightSections;
-	
-	/** 
-	 * If the get method is called on a Y position above what's stored
-	 * this value will be returned. <br><br>
-	 * 
-	 * This needs to be manually defined since sky and block lights behave differently
-	 * for values both above and below what's defined.
-	 */
-	public int aboveMaxYValue;
-	/** @see ChunkLightStorage#aboveMaxYValue */
-	public int belowMinYValue;
-	
-	
-	
-	//=============//
-	// constructor //
-	//=============//
-	
-	public ChunkLightStorage(int minY, int maxY, int aboveMaxYValue, int belowMinYValue) 
-	{
-		this.minY = minY;
-		this.maxY = maxY;
-		
-		this.aboveMaxYValue = aboveMaxYValue;
-		this.belowMinYValue = belowMinYValue;
-	}
-	
-	
-	
-	//=====================//
-	// getters and setters //
-	//=====================//
-	
-	public int get(int x, int y, int z)
-	{
-		if (y < this.minY)
-		{
-			return this.belowMinYValue;
-		}
-		else if (y >= this.maxY)
-		{
-			return  this.aboveMaxYValue;
-		}
-		
-		
-		if (this.lightSections != null)
-		{
-			LightSection lightSection = this.lightSections[BitShiftUtil.divideByPowerOfTwo(y - this.minY, 4)];
-			if (lightSection != null)
-			{
-				return lightSection.get(x, y, z);
-			}
-		}
-		
-		return 0;
-	}
-	
-	public void set(int x, int y, int z, int lightLevel)
-	{
-		if (y < this.minY || y >= this.maxY)
-		{
-			return;
-		}
-		
-		//populate array if it doesn't exist.
-		if (this.lightSections == null)
-		{
-			this.lightSections = new LightSection[BitShiftUtil.divideByPowerOfTwo(this.maxY - this.minY, 4)];
-		}
-		
-		int index = (y - this.minY) >> 4;
-		LightSection lightSection = this.lightSections[index];
-		
-		//populate lightSection in array if it doesn't exist.
-		if (lightSection == null)
-		{
-			lightSection = new LightSection(0);
-			this.lightSections[index] = lightSection;
-		}
-		lightSection.set(x, y, z, lightLevel);
-	}
-	
-	
-	
-	//================//
-	// helper classes //
-	//================//
-	
-	public static class LightSection
-	{
-		public byte constantValue;
-		public long[] data;
-		public short[] counts;
-		
-		public LightSection(int initialValue)
-		{
-			this.constantValue = (byte) (initialValue);
-			this.counts = new short[16];
-			this.counts[initialValue] = 16 * 16 * 16;
-		}
-		
-		public int get(int x, int y, int z)
-		{
-			if (this.constantValue >= 0)
-			{
-				return this.constantValue;
-			}
-			
-			x &= 15;
-			y &= 15;
-			z &= 15;
-			long bits = this.data[(z << 4) | x];
-			return ((int) (bits >>> (y << 2))) & 15;
-		}
-		
-		public void set(int x, int y, int z, int lightLevel)
-		{
-			int oldLightLevel = -1;
-			if (this.constantValue >= 0)
-			{
-				oldLightLevel = this.constantValue;
-				
-				//if the light level didn't change, then there's nothing to do.
-				if (oldLightLevel == lightLevel) return;
-				
-				//if we are a constant value and need to change something,
-				//then that means we need to convert to a non-constant value.
-				this.data = DataRecycler.get();
-				
-				//repeat oldLightLevel 16 times as a bit pattern.
-				long payload = oldLightLevel;
-				payload |= payload << 4;
-				payload |= payload << 8;
-				payload |= payload << 16;
-				payload |= payload << 32;
-				
-				//fill our data with our constant value.
-				Arrays.fill(this.data, payload);
-				
-				//we are no longer a constant value.
-				this.constantValue = -1;
-			}
-			
-			x &= 15;
-			y &= 15;
-			z &= 15;
-			int index = (z << 4) | x;
-			long bits = this.data[index];
-			//if we weren't a constant value before, now's the time to initialize oldLightLevel.
-			if (oldLightLevel < 0)
-			{
-				oldLightLevel = ((int) (bits >>> (y << 2))) & 15;
-			}
-			//clear the 4 bits that correspond to the light level at x, y, z...
-			bits &= ~(15L << (y << 2));
-			//...and then re-populate those bits with the new light level.
-			bits |= ((long) (lightLevel)) << (y << 2);
-			//store the updated bits in our data.
-			this.data[index] = bits;
-			
-			//we have one less of the old light level...
-			this.counts[oldLightLevel]--;
-			//...and one more of the new level.
-			//if the number associated with the new level is now 4096 (AKA 16 ^ 3),
-			//then this implies every position in this section has the same light level,
-			//and therefore we can convert back to a constant value.
-			if (++this.counts[lightLevel] == 4096)
-			{
-				this.constantValue = (byte) (lightLevel);
-				DataRecycler.reclaim(this.data);
-				this.data = null;
-			}
-		}
-		
-	}
-	
-	static class DataRecycler
-	{
-		private static final ArrayList<long[]> recycled = new ArrayList<>(256);
-		
-		static synchronized long[] get()
-		{
-			if (recycled.isEmpty())
-			{
-				return new long[256];
-			}
-			else
-			{
-				return recycled.remove(recycled.size() - 1);
-			}
-		}
-		
-		static synchronized void reclaim(long[] data) { if (recycled.size() < 256) recycled.add(data); }
-	}
-	
-}

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

@@ -25,13 +25,12 @@ import com.seibel.distanthorizons.common.wrappers.worldGeneration.mimicObject.Dh
 import com.seibel.distanthorizons.core.logging.DhLoggerBuilder;
 import com.seibel.distanthorizons.core.pos.DhBlockPos;
 import com.seibel.distanthorizons.core.pos.DhChunkPos;
-import com.seibel.distanthorizons.core.util.LodUtil;
 import com.seibel.distanthorizons.core.wrapperInterfaces.block.IBlockStateWrapper;
+import com.seibel.distanthorizons.core.wrapperInterfaces.chunk.ChunkLightStorage;
 import com.seibel.distanthorizons.core.wrapperInterfaces.chunk.IChunkWrapper;
 import com.seibel.distanthorizons.core.wrapperInterfaces.world.IBiomeWrapper;
 
 import com.seibel.distanthorizons.core.wrapperInterfaces.world.ILevelWrapper;
-import com.seibel.distanthorizons.coreapi.ModInfo;
 import net.minecraft.client.multiplayer.ClientChunkCache;
 import net.minecraft.client.multiplayer.ClientLevel;
 import net.minecraft.core.BlockPos;
@@ -83,9 +82,6 @@ public class ChunkWrapper implements IChunkWrapper
 {
 	private static final Logger LOGGER = DhLoggerBuilder.getLogger();
 	
-	/** useful for debugging, but can slow down chunk operations quite a bit due to being called every time. */
-	private static final boolean RUN_RELATIVE_POS_INDEX_VALIDATION = ModInfo.IS_DEV_BUILD;
-	
 	/** can be used for interactions with the underlying chunk where creating new BlockPos objects could cause issues for the garbage collector. */
 	private static final ThreadLocal<BlockPos.MutableBlockPos> MUTABLE_BLOCK_POS_REF = ThreadLocal.withInitial(() -> new BlockPos.MutableBlockPos());
 	
@@ -109,6 +105,8 @@ public class ChunkWrapper implements IChunkWrapper
 	private int minNonEmptyHeight = Integer.MIN_VALUE;
 	private int maxNonEmptyHeight = Integer.MAX_VALUE;
 	
+	private int blockBiomeHashCode = 0;
+	
 	/**
 	 * Due to vanilla `isClientLightReady()` not being designed for use by a non-render thread, it may return 'true'
 	 * before the light engine has ticked, (right after all light changes is marked by the engine to be processed).
@@ -148,30 +146,34 @@ public class ChunkWrapper implements IChunkWrapper
 	
 	
 	//=========//
-	// methods //
+	// getters //
 	//=========//
 	
 	@Override
-	public int getHeight()
+	public int getHeight() { return getHeight(this.chunk); }
+	public static int getHeight(ChunkAccess chunk)
 	{
 		#if MC_VER < MC_1_17_1
 		return 255;
 		#else
-		return this.chunk.getHeight();
+		return chunk.getHeight();
 		#endif
 	}
 	
 	@Override
-	public int getMinBuildHeight()
+	public int getMinBuildHeight() { return getMinBuildHeight(this.chunk); }
+	public static int getMinBuildHeight(ChunkAccess chunk)
 	{
 		#if MC_VER < MC_1_17_1
 		return 0;
 		#else
-		return this.chunk.getMinBuildHeight();
+		return chunk.getMinBuildHeight();
 		#endif
 	}
+	
 	@Override
-	public int getMaxBuildHeight() { return this.chunk.getMaxBuildHeight(); }
+	public int getMaxBuildHeight() { return getMaxBuildHeight(this.chunk); }
+	public static int getMaxBuildHeight(ChunkAccess chunk) { return chunk.getMaxBuildHeight(); }
 	
 	@Override
 	public int getMinNonEmptyHeight()
@@ -263,7 +265,6 @@ public class ChunkWrapper implements IChunkWrapper
 	public int getLightBlockingHeightMapValue(int xRel, int zRel) { return this.chunk.getOrCreateHeightmapUnprimed(Heightmap.Types.MOTION_BLOCKING).getFirstAvailable(xRel, zRel); }
 	
 	
-	
 	@Override
 	public IBiomeWrapper getBiome(int relX, int relY, int relZ)
 	{
@@ -287,11 +288,35 @@ public class ChunkWrapper implements IChunkWrapper
 		#endif
 	}
 	
+	@Override
+	public IBlockStateWrapper getBlockState(int relX, int relY, int relZ)
+	{
+		this.throwIndexOutOfBoundsIfRelativePosOutsideChunkBounds(relX, relY, relZ);
+		
+		BlockPos.MutableBlockPos blockPos = MUTABLE_BLOCK_POS_REF.get();
+		
+		blockPos.setX(relX);
+		blockPos.setY(relY);
+		blockPos.setZ(relZ);
+		
+		return BlockStateWrapper.fromBlockState(this.chunk.getBlockState(blockPos), this.wrappedLevel);
+	}
+	
 	@Override
 	public DhChunkPos getChunkPos() { return this.chunkPos; }
 	
 	public ChunkAccess getChunk() { return this.chunk; }
 	
+	public ChunkStatus getStatus() { return getStatus(this.getChunk()); }
+	public static ChunkStatus getStatus(ChunkAccess chunk)
+	{
+		#if MC_VER < MC_1_21 
+		return chunk.getStatus();
+		#else
+		return chunk.getPersistedStatus(); 
+		#endif
+	}
+	
 	@Override
 	public int getMaxBlockX() { return this.chunk.getPos().getMaxBlockX(); }
 	@Override
@@ -301,8 +326,11 @@ public class ChunkWrapper implements IChunkWrapper
 	@Override
 	public int getMinBlockZ() { return this.chunk.getPos().getMinBlockZ(); }
 	
-	@Override
-	public long getLongChunkPos() { return this.chunk.getPos().toLong(); }
+	
+	
+	//==========//
+	// lighting //
+	//==========//
 	
 	@Override
 	public void setIsDhLightCorrect(boolean isDhLightCorrect) { this.isDhLightCorrect = isDhLightCorrect; }
@@ -310,8 +338,6 @@ public class ChunkWrapper implements IChunkWrapper
 	@Override
 	public void setUseDhLighting(boolean useDhLighting) { this.useDhLighting = useDhLighting; }
 	
-	
-	
 	@Override
 	public boolean isLightCorrect()
 	{
@@ -364,13 +390,11 @@ public class ChunkWrapper implements IChunkWrapper
 	{
 		if (this.blockLightStorage == null)
 		{
-			this.blockLightStorage = new ChunkLightStorage(
-					this.getMinBuildHeight(), this.getMaxBuildHeight(), 
-					// positions above and below the handled area should be unlit
-					LodUtil.MIN_MC_LIGHT, LodUtil.MIN_MC_LIGHT);
+			this.blockLightStorage = ChunkLightStorage.createBlockLightStorage(this);
 		}
 		return this.blockLightStorage;
 	}
+	public void setBlockLightStorage(ChunkLightStorage lightStorage) { this.blockLightStorage = lightStorage; }
 	
 	
 	@Override
@@ -390,13 +414,11 @@ public class ChunkWrapper implements IChunkWrapper
 	{
 		if (this.skyLightStorage == null)
 		{
-			this.skyLightStorage = new ChunkLightStorage(
-					this.getMinBuildHeight(), this.getMaxBuildHeight(),
-					// positions above should be lit but positions below should be unlit
-					LodUtil.MAX_MC_LIGHT, LodUtil.MIN_MC_LIGHT);
+			this.skyLightStorage = ChunkLightStorage.createSkyLightStorage(this);
 		}
 		return this.skyLightStorage;
 	}
+	public void setSkyLightStorage(ChunkLightStorage lightStorage) { this.skyLightStorage = lightStorage; }
 	
 	
 	@Override
@@ -466,55 +488,6 @@ public class ChunkWrapper implements IChunkWrapper
 		return this.blockLightPosList;
 	}
 	
-	@Override
-	public boolean doNearbyChunksExist()
-	{
-		if (this.lightSource instanceof DhLitWorldGenRegion)
-		{
-			return true;
-		}
-		
-		for (int dx = -1; dx <= 1; dx++)
-		{
-			for (int dz = -1; dz <= 1; dz++)
-			{
-				if (dx == 0 && dz == 0)
-				{
-					continue;
-				}
-				else if (this.lightSource.getChunk(dx + this.chunk.getPos().x, dz + this.chunk.getPos().z, ChunkStatus.BIOMES, false) == null)
-				{
-					return false;
-				}
-			}
-		}
-		
-		return true;
-	}
-	
-	public LevelReader getColorResolver() { return this.lightSource; }
-	
-	@Override
-	public String toString() { return this.chunk.getClass().getSimpleName() + this.chunk.getPos(); }
-	
-	@Override
-	public IBlockStateWrapper getBlockState(int relX, int relY, int relZ)
-	{
-		this.throwIndexOutOfBoundsIfRelativePosOutsideChunkBounds(relX, relY, relZ);
-		
-		BlockPos.MutableBlockPos blockPos = MUTABLE_BLOCK_POS_REF.get();
-		
-		blockPos.setX(relX);
-		blockPos.setY(relY);
-		blockPos.setZ(relZ);
-		
-		return BlockStateWrapper.fromBlockState(this.chunk.getBlockState(blockPos), this.wrappedLevel);
-	}
-	
-	@Override
-	public boolean isStillValid() { return this.wrappedLevel.tryGetChunk(this.chunkPos) == this; }
-	
-	
 	public static void syncedUpdateClientLightStatus()
 	{
 		#if MC_VER < MC_1_18_2
@@ -574,64 +547,57 @@ public class ChunkWrapper implements IChunkWrapper
 	
 	
 	
-	//================//
-	// helper methods //
-	//================//
+	//===============//
+	// other methods //
+	//===============//
 	
-	/** used to prevent accidentally attempting to get/set values outside this chunk's boundaries */
-	private void throwIndexOutOfBoundsIfRelativePosOutsideChunkBounds(int x, int y, int z) throws IndexOutOfBoundsException
+	@Override
+	public boolean doNearbyChunksExist()
 	{
-		if (!RUN_RELATIVE_POS_INDEX_VALIDATION)
+		if (this.lightSource instanceof DhLitWorldGenRegion)
 		{
-			return;
+			return true;
 		}
 		
-		
-		// FIXME +1 is to handle the fact that LodDataBuilder adds +1 to all block lighting calculations, also done in the constructor
-		int minHeight = this.getMinBuildHeight();
-		int maxHeight = this.getMaxBuildHeight() + 1;
-		
-		if (x < 0 || x >= LodUtil.CHUNK_WIDTH
-				|| z < 0 || z >= LodUtil.CHUNK_WIDTH
-				|| y < minHeight || y > maxHeight)
+		for (int dx = -1; dx <= 1; dx++)
 		{
-			String errorMessage = "Relative position [" + x + "," + y + "," + z + "] out of bounds. \n" +
-					"X/Z must be between 0 and 15 (inclusive) \n" +
-					"Y must be between [" + minHeight + "] and [" + maxHeight + "] (inclusive).";
-			throw new IndexOutOfBoundsException(errorMessage);
+			for (int dz = -1; dz <= 1; dz++)
+			{
+				if (dx == 0 && dz == 0)
+				{
+					continue;
+				}
+				else if (this.lightSource.getChunk(dx + this.chunk.getPos().x, dz + this.chunk.getPos().z, ChunkStatus.BIOMES, false) == null)
+				{
+					return false;
+				}
+			}
 		}
-	}
-	
-	
-	/**
-	 * Converts a 3D position into a 1D array index. <br><br>
-	 *
-	 * Source: <br>
-	 * <a href="https://stackoverflow.com/questions/7367770/how-to-flatten-or-index-3d-array-in-1d-array">stackoverflow</a>
-	 */
-	public int relativeBlockPosToIndex(int xRel, int y, int zRel)
-	{
-		int yRel = y - this.getMinBuildHeight();
-		return (zRel * LodUtil.CHUNK_WIDTH * this.getHeight()) + (yRel * LodUtil.CHUNK_WIDTH) + xRel;
-	}
-	
-	/**
-	 * Converts a 3D position into a 1D array index. <br><br>
-	 *
-	 * Source: <br>
-	 * <a href="https://stackoverflow.com/questions/7367770/how-to-flatten-or-index-3d-array-in-1d-array">stackoverflow</a>
-	 */
-	public DhBlockPos indexToRelativeBlockPos(int index)
-	{
-		final int zRel = index / (LodUtil.CHUNK_WIDTH * this.getHeight());
-		index -= (zRel * LodUtil.CHUNK_WIDTH * this.getHeight());
 		
-		final int y = index / LodUtil.CHUNK_WIDTH;
-		final int yRel = y + this.getMinBuildHeight();
-		
-		final int xRel = index % LodUtil.CHUNK_WIDTH;
-		return new DhBlockPos(xRel, yRel, zRel);
+		return true;
 	}
 	
+	@Override
+	public boolean isStillValid() { return this.wrappedLevel.tryGetChunk(this.chunkPos) == this; }
+	
+	
+	
+	//================//
+	// base overrides //
+	//================//
+	
+	@Override
+	public String toString() { return this.chunk.getClass().getSimpleName() + this.chunk.getPos(); }
+	
+	//@Override 
+	//public int hashCode()
+	//{
+	//	if (this.blockBiomeHashCode == 0)
+	//	{
+	//		this.blockBiomeHashCode = this.getBlockBiomeHashCode();
+	//	}
+	//	
+	//	return this.blockBiomeHashCode;
+	//}
 	
 }

common/src/main/java/com/seibel/distanthorizons/common/wrappers/gui/ClassicConfigGUI.java

@@ -245,7 +245,7 @@ public class ClassicConfigGUI
 			}
 			
 			// Changelog button
-			if (Config.Client.Advanced.AutoUpdater.enableAutoUpdater.get() && Config.Client.Advanced.AutoUpdater.updateBranch.get() == EDhApiUpdateBranch.STABLE)
+			if (Config.Client.Advanced.AutoUpdater.enableAutoUpdater.get() && !ModInfo.IS_DEV_BUILD) // we only have changelogs for stable builds
 			{
 				this.addBtn(new TexturedButtonWidget(
 						// Where the button is on the screen
@@ -255,7 +255,13 @@ public class ClassicConfigGUI
 						// texture UV Offset
 						0, 0,
 						// Some textuary stuff
-						0, new ResourceLocation(ModInfo.ID, "textures/gui/changelog.png"), 20, 20,
+						0, 
+						#if MC_VER < MC_1_21 
+						new ResourceLocation(ModInfo.ID, "textures/gui/changelog.png"),
+						#else
+						ResourceLocation.fromNamespaceAndPath(ModInfo.ID, "textures/gui/changelog.png"),
+						#endif
+						20, 20,
 						// Create the button and tell it where to go
 						(buttonWidget) -> {
 							ChangelogScreen changelogScreen = new ChangelogScreen(this);

common/src/main/java/com/seibel/distanthorizons/common/wrappers/gui/updater/ChangelogScreen.java

@@ -168,10 +168,9 @@ public class ChangelogScreen extends DhScreen
 		#endif
 		
 		
-		this.changelogArea.render(matrices, mouseX, mouseY, delta); // Render the changelog
-		
+		// render order matters, otherwise on 1.20.6+ the blurred background will render on top of the text
 		super.render(matrices, mouseX, mouseY, delta); // Render the buttons
-		
+		this.changelogArea.render(matrices, mouseX, mouseY, delta); // Render the changelog
 		DhDrawCenteredString(matrices, font, title, width / 2, 15, 0xFFFFFF); // Render title
 	}
 	

common/src/main/java/com/seibel/distanthorizons/common/wrappers/gui/updater/UpdateModScreen.java

@@ -41,16 +41,18 @@ public class UpdateModScreen extends DhScreen
 		super(Translatable(ModInfo.ID + ".updater.title"));
 		this.parent = parent;
 		this.newVersionID = newVersionID;
-
-        switch (Config.Client.Advanced.AutoUpdater.updateBranch.get()) {
-	        case STABLE:
-                currentVer = ModInfo.VERSION;
-                nextVer = ModrinthGetter.releaseNames.get(this.newVersionID);
-				break;
-	        case NIGHTLY:
-                currentVer = ModJarInfo.Git_Commit.substring(0,7);
-                nextVer = this.newVersionID.substring(0,7);
-				break;
+		
+		
+		EDhApiUpdateBranch updateBranch = EDhApiUpdateBranch.convertAutoToStableOrNightly(Config.Client.Advanced.AutoUpdater.updateBranch.get());
+		if (updateBranch == EDhApiUpdateBranch.STABLE)
+        {
+	        this.currentVer = ModInfo.VERSION;
+	        this.nextVer = ModrinthGetter.releaseNames.get(this.newVersionID);
+        }
+	    else
+        {
+	        this.currentVer = ModJarInfo.Git_Commit.substring(0,7);
+	        this.nextVer = this.newVersionID.substring(0,7);
         }
 	}
 	
@@ -73,7 +75,13 @@ public class UpdateModScreen extends DhScreen
 					// Offset
 					0, 0,
 					// Some textuary stuff
-					0, new ResourceLocation(ModInfo.ID, "logo.png"), 130, 65,
+					0, 
+					#if MC_VER < MC_1_21 
+					new ResourceLocation(ModInfo.ID, "logo.png"),
+					#else
+					ResourceLocation.fromNamespaceAndPath(ModInfo.ID, "logo.png"),
+					#endif
+					130, 65,
 					// Create the button and tell it where to go
 					// For now it goes to the client option by default
 					(buttonWidget) -> System.out.println("Nice, you found an easter egg :)"), // TODO: Add a proper easter egg to pressing the logo (maybe with confetti)
@@ -88,7 +96,7 @@ public class UpdateModScreen extends DhScreen
 			e.printStackTrace();
 		}
 		
-		if (Config.Client.Advanced.AutoUpdater.updateBranch.get() == EDhApiUpdateBranch.STABLE)
+		if (!ModInfo.IS_DEV_BUILD)
 		{
 			this.addBtn(new TexturedButtonWidget(
 					// Where the button is on the screen
@@ -98,7 +106,13 @@ public class UpdateModScreen extends DhScreen
 					// Offset
 					0, 0,
 					// Some textuary stuff
-					0, new ResourceLocation(ModInfo.ID, "textures/gui/changelog.png"), 20, 20,
+					0, 
+					#if MC_VER < MC_1_21 
+					new ResourceLocation(ModInfo.ID, "textures/gui/changelog.png"),
+					#else
+					ResourceLocation.fromNamespaceAndPath(ModInfo.ID, "textures/gui/changelog.png"),
+					#endif
+					20, 20,
 					// Create the button and tell it where to go
 					(buttonWidget) -> Objects.requireNonNull(minecraft).setScreen(new ChangelogScreen(this, this.newVersionID)), // TODO: Add a proper easter egg to pressing the logo (maybe with confetti)
 					// Add a title to the button

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

@@ -12,16 +12,20 @@ public class MinecraftDedicatedServerWrapper implements IMinecraftSharedWrapper
 	private MinecraftDedicatedServerWrapper() { }
 	public DedicatedServer dedicatedServer = null;
 	@Override
-	public boolean isDedicatedServer()
-	{
-		return true;
-	}
+	public boolean isDedicatedServer() { return true; }
 	@Override
 	public File getInstallationDirectory()
 	{
-		if (dedicatedServer == null)
+		if (this.dedicatedServer == null)
+		{
 			throw new IllegalStateException("Trying to get Installation Direction before Dedicated server complete initialization!");
-		return dedicatedServer.getServerDirectory();
+		}
+		
+		#if MC_VER < MC_1_21
+		return this.dedicatedServer.getServerDirectory();
+		#else
+		return this.dedicatedServer.getServerDirectory().toFile();
+		#endif
 	}
 	
 }

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

@@ -212,15 +212,24 @@ public class MinecraftRenderWrapper implements IMinecraftRenderWrapper
 	{
 		if (MC.level.dimensionType().hasSkyLight())
 		{
-			#if MC_VER < MC_1_17_1
-			Vec3 colorValues = MC.level.getSkyColor(MC.gameRenderer.getMainCamera().getBlockPosition(), MC.getFrameTime());
+			float frameTime;
+			#if MC_VER < MC_1_21
+			frameTime = MC.getFrameTime();
 			#else
-			Vec3 colorValues = MC.level.getSkyColor(MC.gameRenderer.getMainCamera().getPosition(), MC.getFrameTime());
+			frameTime = MC.getTimer().getRealtimeDeltaTicks();
+			#endif
+			
+			#if MC_VER < MC_1_17_1
+			Vec3 colorValues = MC.level.getSkyColor(MC.gameRenderer.getMainCamera().getBlockPosition(), frameTime);
+			#else
+			Vec3 colorValues = MC.level.getSkyColor(MC.gameRenderer.getMainCamera().getPosition(), frameTime);
 			#endif
 			return new Color((float) colorValues.x, (float) colorValues.y, (float) colorValues.z);
 		}
 		else
+		{
 			return new Color(0, 0, 0);
+		}
 	}
 	
 	@Override

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

@@ -35,6 +35,7 @@ import com.seibel.distanthorizons.core.pos.DhChunkPos;
 import com.seibel.distanthorizons.core.util.objects.EventTimer;
 import com.seibel.distanthorizons.core.util.LodUtil;
 import com.seibel.distanthorizons.core.util.gridList.ArrayGridList;
+import com.seibel.distanthorizons.core.wrapperInterfaces.chunk.ChunkLightStorage;
 import com.seibel.distanthorizons.core.wrapperInterfaces.chunk.IChunkWrapper;
 import com.seibel.distanthorizons.core.wrapperInterfaces.worldGeneration.AbstractBatchGenerationEnvironmentWrapper;
 import com.seibel.distanthorizons.common.wrappers.chunk.ChunkWrapper;
@@ -109,8 +110,6 @@ public final class BatchGenerationEnvironment extends AbstractBatchGenerationEnv
 			new ConfigBasedLogger(LogManager.getLogger("LodWorldGen"),
 					() -> Config.Client.Advanced.Logging.logWorldGenLoadEvent.get());
 	
-	//TODO: Make actual proper support for StarLight
-	
 	public static class PerfCalculator
 	{
 		private static final String[] TIME_NAMES = {
@@ -294,6 +293,9 @@ public final class BatchGenerationEnvironment extends AbstractBatchGenerationEnv
 	
 	
 	
+	//=================//
+	// synchronization //
+	//=================//
 	
 	public <T> T joinSync(CompletableFuture<T> future)
 	{
@@ -344,7 +346,7 @@ public final class BatchGenerationEnvironment extends AbstractBatchGenerationEnv
 			}
 			else if (event.hasTimeout(Config.Client.Advanced.WorldGenerator.worldGenerationTimeoutLengthInSeconds.get(), TimeUnit.SECONDS))
 			{
-				EVENT_LOGGER.error("Batching World Generator: " + event + " timed out and terminated!");
+				EVENT_LOGGER.error("Batching World Generator: " + event + " timed out and terminated! Please lower your CPU load.");
 				EVENT_LOGGER.info("Dump PrefEvent: " + event.timer);
 				try
 				{
@@ -368,31 +370,197 @@ public final class BatchGenerationEnvironment extends AbstractBatchGenerationEnv
 		}
 	}
 	
-	private static ProtoChunk EmptyChunk(ServerLevel level, ChunkPos chunkPos)
-	{
-		return new ProtoChunk(chunkPos, UpgradeData.EMPTY
-					#if MC_VER >= MC_1_17_1 , level #endif
-					#if MC_VER >= MC_1_18_2 , level.registryAccess().registryOrThrow(
-						#if MC_VER < MC_1_19_4
-				Registry.BIOME_REGISTRY
-						#else
-				Registries.BIOME
-						#endif
-		), null #endif
-		);
-		
-	}
 	
-	public ChunkAccess loadOrMakeChunk(ChunkPos chunkPos)
+	
+	//==================//
+	// world generation //
+	//==================//
+	
+	public void generateLodFromList(GenerationEvent genEvent) throws InterruptedException
+	{
+		EVENT_LOGGER.debug("Lod Generate Event: " + genEvent.minPos);
+		
+		ArrayGridList<ChunkWrapper> chunkWrapperList;
+		DhLitWorldGenRegion region;
+		DummyLightEngine dummyLightEngine;
+		LightGetterAdaptor adaptor;
+		
+		int borderSize = MaxBorderNeeded;
+		int refSize = genEvent.size + borderSize * 2;
+		int refPosX = genEvent.minPos.x - borderSize;
+		int refPosZ = genEvent.minPos.z - borderSize;
+		
+		try
+		{
+			ArrayGridList<ChunkAccess> totalChunks;
+			
+			adaptor = new LightGetterAdaptor(this.params.level);
+			dummyLightEngine = new DummyLightEngine(adaptor);
+			
+			
+			
+			//=============================//
+			// try getting existing chunks //
+			//=============================//
+			
+			HashMap<DhChunkPos, ChunkLightStorage> chunkSkyLightingByDhPos = new HashMap<>();
+			HashMap<DhChunkPos, ChunkLightStorage> chunkBlockLightingByDhPos = new HashMap<>();
+			IEmptyChunkGeneratorFunc emptyChunkGeneratorFunc = (int x, int z) ->
+			{
+				ChunkPos chunkPos = new ChunkPos(x, z);
+				DhChunkPos dhChunkPos = new DhChunkPos(x, z);
+				ChunkAccess newChunk = null;
+				try
+				{
+					// get the chunk
+					CompoundTag chunkData = this.getChunkNbtData(chunkPos);
+					newChunk = this.loadOrMakeChunk(chunkPos, chunkData);
+					
+					// get chunk lighting
+					ChunkLoader.CombinedChunkLightStorage combinedLights = ChunkLoader.readLight(newChunk, chunkData);
+					if (combinedLights != null)
+					{
+						chunkSkyLightingByDhPos.put(dhChunkPos, combinedLights.skyLightStorage);
+						chunkBlockLightingByDhPos.put(dhChunkPos, combinedLights.blockLightStorage);
+					}
+				}
+				catch (RuntimeException loadChunkError)
+				{
+					// Continue...
+				}
+				
+				if (newChunk == null)
+				{
+					newChunk = new ProtoChunk(chunkPos, UpgradeData.EMPTY
+							#if MC_VER >= MC_1_17_1 , this.params.level #endif
+							#if MC_VER >= MC_1_18_2 , this.params.biomes, null #endif
+					);
+				}
+				return newChunk;
+			};
+			totalChunks = new ArrayGridList<>(refSize, (x, z) -> emptyChunkGeneratorFunc.generate(x + refPosX, z + refPosZ));
+			
+			int radius = refSize / 2;
+			int centerX = refPosX + radius;
+			int centerZ = refPosZ + radius;
+			
+			ChunkAccess centerChunk = totalChunks.stream().filter(chunk -> chunk.getPos().x == centerX && chunk.getPos().z == centerZ).findFirst().get();
+			
+			genEvent.refreshTimeout();
+			region = new DhLitWorldGenRegion(
+					centerX, centerZ,
+					centerChunk,
+					this.params.level, dummyLightEngine, totalChunks,
+					ChunkStatus.STRUCTURE_STARTS, radius, emptyChunkGeneratorFunc);
+			adaptor.setRegion(region);
+			genEvent.threadedParam.makeStructFeat(region, this.params);
+			
+			
+			
+			//=======================//
+			// create chunk wrappers //
+			//=======================//
+			
+			chunkWrapperList = new ArrayGridList<>(totalChunks.gridSize);
+			totalChunks.forEachPos((x, z) ->
+			{
+				ChunkAccess chunk = totalChunks.get(x, z);
+				if (chunk != null)
+				{
+					// wrap the chunk
+					ChunkWrapper chunkWrapper = new ChunkWrapper(chunk, region, this.serverlevel.getLevelWrapper());
+					chunkWrapperList.set(x, z, chunkWrapper);
+					
+					// try getting the chunk lighting
+					if (chunkBlockLightingByDhPos.containsKey(chunkWrapper.getChunkPos()))
+					{
+						chunkWrapper.setBlockLightStorage(chunkBlockLightingByDhPos.get(chunkWrapper.getChunkPos()));
+						chunkWrapper.setSkyLightStorage(chunkSkyLightingByDhPos.get(chunkWrapper.getChunkPos()));
+						chunkWrapper.setUseDhLighting(true);
+						chunkWrapper.setIsDhLightCorrect(true);
+					}
+					else
+					{
+						int k = 0;
+					}
+				}
+			});
+			
+			
+			
+			//=================//
+			// generate chunks //
+			//=================//
+			
+			this.generateDirect(genEvent, chunkWrapperList, borderSize, genEvent.targetGenerationStep, region);
+			genEvent.timer.nextEvent("cleanup");
+		}
+		catch (StepStructureStart.StructStartCorruptedException f)
+		{
+			genEvent.threadedParam.markAsInvalid();
+			throw (RuntimeException) f.getCause();
+		}
+		
+		ArrayGridList<ChunkWrapper> finalGenChunks = GetCutoutFrom(chunkWrapperList, borderSize);
+		for (int offsetY = 0; offsetY < finalGenChunks.gridSize; offsetY++)
+		{
+			for (int offsetX = 0; offsetX < finalGenChunks.gridSize; offsetX++)
+			{
+				ChunkWrapper wrappedChunk = finalGenChunks.get(offsetX, offsetY);
+				ChunkAccess target = wrappedChunk.getChunk();
+				if (target instanceof LevelChunk)
+				{
+					#if MC_VER == MC_1_16_5 || MC_VER == MC_1_17_1
+					((LevelChunk) target).setLoaded(true);
+					#else
+					((LevelChunk) target).loaded = true;
+					#endif
+				}
+				
+				if (!wrappedChunk.isLightCorrect())
+				{
+					throw new RuntimeException("The generated chunk somehow has isLightCorrect() returning false");
+				}
+				
+				boolean isFull = ChunkWrapper.getStatus(target) == ChunkStatus.FULL || target instanceof LevelChunk;
+				#if MC_VER >= MC_1_18_2
+				boolean isPartial = target.isOldNoiseGeneration();
+				#endif
+				if (isFull)
+				{
+					LOAD_LOGGER.info("Detected full existing chunk at {}", target.getPos());
+					genEvent.resultConsumer.accept(wrappedChunk);
+				}
+				#if MC_VER >= MC_1_18_2
+				else if (isPartial)
+				{
+					LOAD_LOGGER.info("Detected old existing chunk at {}", target.getPos());
+					genEvent.resultConsumer.accept(wrappedChunk);
+				}
+				#endif
+				else if (ChunkWrapper.getStatus(target) == ChunkStatus.EMPTY)
+				{
+					genEvent.resultConsumer.accept(wrappedChunk);
+				}
+				else
+				{
+					genEvent.resultConsumer.accept(wrappedChunk);
+				}
+			}
+		}
+		
+		genEvent.timer.complete();
+		genEvent.refreshTimeout();
+		if (PREF_LOGGER.canMaybeLog())
+		{
+			genEvent.threadedParam.perf.recordEvent(genEvent.timer);
+			PREF_LOGGER.infoInc("{}", genEvent.timer);
+		}
+	}
+	private CompoundTag getChunkNbtData(ChunkPos chunkPos)
 	{
 		ServerLevel level = this.params.level;
 		
-		
-		
-		//====================//
-		// get the chunk data //
-		//====================//
-		
 		CompoundTag chunkData = null;
 		try
 		{
@@ -425,15 +593,15 @@ public final class BatchGenerationEnvironment extends AbstractBatchGenerationEnv
 			LOAD_LOGGER.error("DistantHorizons: Couldn't load or make chunk " + chunkPos + ". Error: " + e.getMessage(), e);
 		}
 		
-		
-		
-		//========================//
-		// convert the chunk data //
-		//========================//
+		return chunkData;
+	}
+	private ChunkAccess loadOrMakeChunk(ChunkPos chunkPos, CompoundTag chunkData)
+	{
+		ServerLevel level = this.params.level;
 		
 		if (chunkData == null)
 		{
-			return EmptyChunk(level, chunkPos);
+			return CreateEmptyChunk(level, chunkPos);
 		}
 		else
 		{
@@ -445,154 +613,28 @@ public final class BatchGenerationEnvironment extends AbstractBatchGenerationEnv
 			catch (Exception e)
 			{
 				LOAD_LOGGER.error(
-					"DistantHorizons: couldn't load or make chunk at ["+chunkPos+"]." +
-					"Please try optimizing your world to fix this issue. \n" +
-					"World optimization can be done from the singleplayer world selection screen.\n" +
-					"Error: ["+e.getMessage()+"]."
-					, e);
+						"DistantHorizons: couldn't load or make chunk at ["+chunkPos+"]." +
+								"Please try optimizing your world to fix this issue. \n" +
+								"World optimization can be done from the singleplayer world selection screen.\n" +
+								"Error: ["+e.getMessage()+"]."
+						, e);
 				
-				return EmptyChunk(level, chunkPos);
+				return CreateEmptyChunk(level, chunkPos);
 			}
 		}
 	}
-	
-	private static <T> ArrayGridList<T> GetCutoutFrom(ArrayGridList<T> total, int border)
+	private static ProtoChunk CreateEmptyChunk(ServerLevel level, ChunkPos chunkPos)
 	{
-		return new ArrayGridList<>(total, border, total.gridSize - border);
-	}
-	
-	private static <T> ArrayGridList<T> GetCutoutFrom(ArrayGridList<T> total, EDhApiWorldGenerationStep step)
-	{
-		return GetCutoutFrom(total, MaxBorderNeeded - BorderNeeded.get(step));
-	}
-	
-	public void generateLodFromList(GenerationEvent genEvent) throws InterruptedException
-	{
-		EVENT_LOGGER.debug("Lod Generate Event: " + genEvent.minPos);
-		
-		ArrayGridList<ChunkWrapper> chunkWrapperList;
-		DhLitWorldGenRegion region;
-		DummyLightEngine lightEngine;
-		LightGetterAdaptor adaptor;
-		
-		int borderSize = MaxBorderNeeded;
-		int refSize = genEvent.size + borderSize * 2;
-		int refPosX = genEvent.minPos.x - borderSize;
-		int refPosZ = genEvent.minPos.z - borderSize;
-		
-		try
-		{
-			ArrayGridList<ChunkAccess> totalChunks;
-			
-			adaptor = new LightGetterAdaptor(this.params.level);
-			lightEngine = new DummyLightEngine(adaptor);
-			
-			EmptyChunkGenerator generator = (int x, int z) ->
-			{
-				ChunkPos chunkPos = new ChunkPos(x, z);
-				ChunkAccess target = null;
-				try
-				{
-					target = this.loadOrMakeChunk(chunkPos);
-				}
-				catch (RuntimeException e2)
-				{
-					// Continue...
-				}
-				
-				if (target == null)
-				{
-					target = new ProtoChunk(chunkPos, UpgradeData.EMPTY
-							#if MC_VER >= MC_1_17_1 , params.level #endif
-							#if MC_VER >= MC_1_18_2 , params.biomes, null #endif
-					);
-				}
-				return target;
-			};
-			
-			totalChunks = new ArrayGridList<>(refSize, (x, z) -> generator.generate(x + refPosX, z + refPosZ));
-			
-			genEvent.refreshTimeout();
-			region = new DhLitWorldGenRegion(params.level, lightEngine, totalChunks,
-					ChunkStatus.STRUCTURE_STARTS, refSize / 2, generator);
-			adaptor.setRegion(region);
-			genEvent.threadedParam.makeStructFeat(region, params);
-			
-			
-			chunkWrapperList = new ArrayGridList<>(totalChunks.gridSize);
-			totalChunks.forEachPos((x, z) ->
-			{
-				ChunkAccess chunk = totalChunks.get(x, z);
-				if (chunk != null)
-				{
-					chunkWrapperList.set(x, z, new ChunkWrapper(chunk, region, serverlevel.getLevelWrapper()));
-				}
-			});
-			
-			this.generateDirect(genEvent, chunkWrapperList, borderSize, genEvent.targetGenerationStep, region);
-			genEvent.timer.nextEvent("cleanup");
-		}
-		catch (StepStructureStart.StructStartCorruptedException f)
-		{
-			genEvent.threadedParam.markAsInvalid();
-			throw (RuntimeException) f.getCause();
-		}
-		
-		ArrayGridList<ChunkWrapper> finalGenChunks = GetCutoutFrom(chunkWrapperList, borderSize);
-		for (int offsetY = 0; offsetY < finalGenChunks.gridSize; offsetY++)
-		{
-			for (int offsetX = 0; offsetX < finalGenChunks.gridSize; offsetX++)
-			{
-				ChunkWrapper wrappedChunk = finalGenChunks.get(offsetX, offsetY);
-				ChunkAccess target = wrappedChunk.getChunk();
-				if (target instanceof LevelChunk)
-				{
-					#if MC_VER == MC_1_16_5 || MC_VER == MC_1_17_1
-					((LevelChunk) target).setLoaded(true);
-					#else
-					((LevelChunk) target).loaded = true;
-					#endif
-				}
-				
-				if (!wrappedChunk.isLightCorrect())
-				{
-					throw new RuntimeException("The generated chunk somehow has isLightCorrect() returning false");
-				}
-				
-				boolean isFull = target.getStatus() == ChunkStatus.FULL || target instanceof LevelChunk;
-				#if MC_VER >= MC_1_18_2
-				boolean isPartial = target.isOldNoiseGeneration();
-				#endif
-				if (isFull)
-				{
-					LOAD_LOGGER.info("Detected full existing chunk at {}", target.getPos());
-					genEvent.resultConsumer.accept(wrappedChunk);
-				}
-				#if MC_VER >= MC_1_18_2
-				else if (isPartial)
-				{
-					LOAD_LOGGER.info("Detected old existing chunk at {}", target.getPos());
-					genEvent.resultConsumer.accept(wrappedChunk);
-				}
-				#endif
-				else if (target.getStatus() == ChunkStatus.EMPTY)
-				{
-					genEvent.resultConsumer.accept(wrappedChunk);
-				}
-				else
-				{
-					genEvent.resultConsumer.accept(wrappedChunk);
-				}
-			}
-		}
-		
-		genEvent.timer.complete();
-		genEvent.refreshTimeout();
-		if (PREF_LOGGER.canMaybeLog())
-		{
-			genEvent.threadedParam.perf.recordEvent(genEvent.timer);
-			PREF_LOGGER.infoInc("{}", genEvent.timer);
-		}
+		return new ProtoChunk(chunkPos, UpgradeData.EMPTY
+					#if MC_VER >= MC_1_17_1 , level #endif
+					#if MC_VER >= MC_1_18_2 , level.registryAccess().registryOrThrow(
+						#if MC_VER < MC_1_19_4
+				Registry.BIOME_REGISTRY
+						#else
+				Registries.BIOME
+						#endif
+		), null #endif
+		);
 	}
 	
 	public void generateDirect(
@@ -694,7 +736,7 @@ public final class BatchGenerationEnvironment extends AbstractBatchGenerationEnv
 			for (int i = 0; i < chunksToGenerate.size(); i++) // regular for loop since enhanced for loops increase GC pressure slightly
 			{
 				ChunkWrapper chunkWrapper = chunksToGenerate.get(i);
-				if (chunkWrapper.getChunk().getStatus() != ChunkStatus.EMPTY)
+				if (chunkWrapper.getStatus() != ChunkStatus.EMPTY)
 				{
 					iChunkWrapperList.add(chunkWrapper);
 				}
@@ -715,19 +757,19 @@ public final class BatchGenerationEnvironment extends AbstractBatchGenerationEnv
 				// if this isn't done everything else afterward may fail
 				Heightmap.primeHeightmaps(((ChunkWrapper)centerChunk).getChunk(), ChunkStatus.FEATURES.heightmapsAfter());
 				
-				// populate the lighting
-				DhLightingEngine.INSTANCE.lightChunk(centerChunk, iChunkWrapperList, maxSkyLight);
+				// pre-generated chunks should have lighting but new ones won't
+				if (!centerChunk.isLightCorrect())
+				{
+					DhLightingEngine.INSTANCE.lightChunk(centerChunk, iChunkWrapperList, maxSkyLight);
+				}
 			}
 			
 			genEvent.refreshTimeout();
 		}
 	}
+	private static <T> ArrayGridList<T> GetCutoutFrom(ArrayGridList<T> total, int border) { return new ArrayGridList<>(total, border, total.gridSize - border); }
+	private static <T> ArrayGridList<T> GetCutoutFrom(ArrayGridList<T> total, EDhApiWorldGenerationStep step) { return GetCutoutFrom(total, MaxBorderNeeded - BorderNeeded.get(step)); }
 	
-	public interface EmptyChunkGenerator
-	{
-		ChunkAccess generate(int x, int z);
-		
-	}
 	
 	@Override
 	public int getEventCount() { return this.generationEventList.size(); }
@@ -776,6 +818,12 @@ public final class BatchGenerationEnvironment extends AbstractBatchGenerationEnv
 		return genEvent.future;
 	}
 	
+	
+	
+	//================//
+	// helper methods //
+	//================//
+	
 	/**
 	 * Called before code that may run for an extended period of time. <br>
 	 * This is necessary to allow canceling world gen since waiting
@@ -789,4 +837,16 @@ public final class BatchGenerationEnvironment extends AbstractBatchGenerationEnv
 		}
 	}
 	
+	
+	
+	//================//
+	// helper classes //
+	//================//
+	
+	@FunctionalInterface
+	public interface IEmptyChunkGeneratorFunc
+	{
+		ChunkAccess generate(int x, int z);
+	}
+	
 }

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

@@ -22,9 +22,14 @@ package com.seibel.distanthorizons.common.wrappers.worldGeneration.mimicObject;
 import com.google.common.collect.Maps;
 import com.mojang.serialization.Codec;
 import com.mojang.serialization.Dynamic;
+import com.seibel.distanthorizons.common.wrappers.chunk.ChunkWrapper;
 import com.seibel.distanthorizons.common.wrappers.worldGeneration.BatchGenerationEnvironment;
 
 import com.seibel.distanthorizons.core.logging.ConfigBasedLogger;
+import com.seibel.distanthorizons.core.util.LodUtil;
+import com.seibel.distanthorizons.core.wrapperInterfaces.block.IBlockStateWrapper;
+import com.seibel.distanthorizons.core.wrapperInterfaces.chunk.ChunkLightStorage;
+import com.seibel.distanthorizons.core.wrapperInterfaces.chunk.IChunkWrapper;
 import it.unimi.dsi.fastutil.longs.LongOpenHashSet;
 import it.unimi.dsi.fastutil.longs.LongSet;
 
@@ -44,6 +49,7 @@ import net.minecraft.core.registries.Registries;
 import net.minecraft.nbt.CompoundTag;
 import net.minecraft.nbt.ListTag;
 import net.minecraft.nbt.NbtOps;
+import net.minecraft.nbt.Tag;
 import net.minecraft.resources.ResourceKey;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.level.*;
@@ -79,6 +85,9 @@ import net.minecraft.world.level.material.Fluids;
 #if MC_VER == MC_1_20_6
 import net.minecraft.world.level.chunk.status.ChunkStatus;
 import net.minecraft.world.level.chunk.status.ChunkType;
+#elif MC_VER == MC_1_21
+import net.minecraft.world.level.chunk.status.ChunkStatus;
+import net.minecraft.world.level.chunk.status.ChunkType;
 #endif
 
 import net.minecraft.world.level.material.Fluid;
@@ -100,138 +109,13 @@ public class ChunkLoader
 	private static final String FLUID_TICKS_TAG_PRE18 = "LiquidTicks";
 	private static final ConfigBasedLogger LOGGER = BatchGenerationEnvironment.LOAD_LOGGER;
 	
-	#if MC_VER >= MC_1_18_2
-	private static BlendingData readBlendingData(CompoundTag chunkData)
-	{
-		BlendingData blendingData = null;
-		if (chunkData.contains("blending_data", 10))
-		{
-			@SuppressWarnings({"unchecked", "rawtypes"})
-			Dynamic<CompoundTag> blendingDataTag = new Dynamic(NbtOps.INSTANCE, chunkData.getCompound("blending_data"));
-			blendingData = BlendingData.CODEC.parse(blendingDataTag).resultOrPartial(LOGGER::error).orElse(null);
-		}
-		return blendingData;
-	}
-	#endif
+	private static boolean lightingSectionErrorLogged = false;
 	
-	private static LevelChunkSection[] readSections(LevelAccessor level, ChunkPos chunkPos, CompoundTag chunkData)
-	{
-		#if MC_VER >= MC_1_18_2
-		#if MC_VER < MC_1_19_4
-		Registry<Biome> biomes = level.registryAccess().registryOrThrow(Registry.BIOME_REGISTRY);
-		#else
-		Registry<Biome> biomes = level.registryAccess().registryOrThrow(Registries.BIOME);
-		#endif
-			#if MC_VER < MC_1_18_2
-			Codec<PalettedContainer<Biome>> biomeCodec = PalettedContainer.codec(
-					biomes, biomes.byNameCodec(), PalettedContainer.Strategy.SECTION_BIOMES, biomes.getOrThrow(Biomes.PLAINS));
-			#elif MC_VER < MC_1_19_2
-		Codec<PalettedContainer<Holder<Biome>>> biomeCodec = PalettedContainer.codec(
-				biomes.asHolderIdMap(), biomes.holderByNameCodec(), PalettedContainer.Strategy.SECTION_BIOMES, biomes.getHolderOrThrow(Biomes.PLAINS));
-			#else
-		Codec<PalettedContainer<Holder<Biome>>> biomeCodec = PalettedContainer.codecRW(
-				biomes.asHolderIdMap(), biomes.holderByNameCodec(), PalettedContainer.Strategy.SECTION_BIOMES, biomes.getHolderOrThrow(Biomes.PLAINS));
-			#endif
-		#endif
-		int i = #if MC_VER < MC_1_17_1 16; #else level.getSectionsCount(); #endif
-		LevelChunkSection[] chunkSections = new LevelChunkSection[i];
-		
-		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)
-		{
-			CompoundTag tagSection = tagSections.getCompound(j);
-			int sectionYPos = tagSection.getByte("Y");
-
-			#if MC_VER < MC_1_18_2
-			if (tagSection.contains("Palette", 9) && tagSection.contains("BlockStates", 12))
-			{
-				LevelChunkSection levelChunkSection = new LevelChunkSection(sectionYPos << 4);
-				levelChunkSection.getStates().read(tagSection.getList("Palette", 10),
-						tagSection.getLongArray("BlockStates"));
-				levelChunkSection.recalcBlockCounts();
-				if (!levelChunkSection.isEmpty())
-					chunkSections[#if MC_VER < MC_1_17_1 sectionYPos #else level.getSectionIndexFromSectionY(sectionYPos) #endif ]
-							= levelChunkSection;
-			}
-			#else
-			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;
-				#endif
-				
-				blockStateContainer = tagSection.contains("block_states", 10)
-						? BLOCK_STATE_CODEC.parse(NbtOps.INSTANCE, tagSection.getCompound("block_states")).promotePartial(string -> logErrors(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)
-						: new PalettedContainer<Biome>(biomes, biomes.getOrThrow(Biomes.PLAINS), PalettedContainer.Strategy.SECTION_BIOMES);
-				#else
-				
-				biomeContainer = tagSection.contains("biomes", 10)
-						? biomeCodec.parse(NbtOps.INSTANCE, tagSection.getCompound("biomes")).promotePartial(string -> logErrors(chunkPos, i, (String) string))
-							#if MC_VER < MC_1_20_6 .getOrThrow(false, LOGGER::error) #else .getOrThrow((message) -> (RuntimeException) LOGGER.errorAndThrow(message, null)) #endif
-						: new PalettedContainer<Holder<Biome>>(biomes.asHolderIdMap(), biomes.getHolderOrThrow(Biomes.PLAINS), 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);
-				#endif
-			}
-			#endif
-			
-		}
-		return chunkSections;
-	}
 	
-	private static void readHeightmaps(LevelChunk chunk, CompoundTag chunkData)
-	{
-		CompoundTag tagHeightmaps = chunkData.getCompound("Heightmaps");
-		for (Heightmap.Types type : ChunkStatus.FULL.heightmapsAfter())
-		{
-			String heightmap = type.getSerializationKey();
-			if (tagHeightmaps.contains(heightmap, 12))
-				chunk.setHeightmap(type, tagHeightmaps.getLongArray(heightmap));
-		}
-		Heightmap.primeHeightmaps(chunk, ChunkStatus.FULL.heightmapsAfter());
-	}
 	
-	private static void readPostPocessings(LevelChunk chunk, CompoundTag chunkData)
-	{
-		ListTag tagPostProcessings = chunkData.getList("PostProcessing", 9);
-		for (int n = 0; n < tagPostProcessings.size(); ++n)
-		{
-			ListTag listTag3 = tagPostProcessings.getList(n);
-			for (int o = 0; o < listTag3.size(); ++o)
-			{
-				chunk.addPackedPostProcess(listTag3.getShort(o), n);
-			}
-		}
-	}
-	
-	public static #if MC_VER < MC_1_20_6 ChunkStatus.ChunkType #else ChunkType #endif readChunkType(CompoundTag tagLevel)
-	{
-		ChunkStatus chunkStatus = ChunkStatus.byName(tagLevel.getString("Status"));
-		if (chunkStatus != null)
-		{
-			return chunkStatus.getChunkType();
-		}
-		
-		return #if MC_VER < MC_1_20_6 ChunkStatus.ChunkType.PROTOCHUNK; #else ChunkType.PROTOCHUNK; #endif
-	}
+	//============//
+	// read chunk //
+	//============//
 	
 	public static LevelChunk read(WorldGenLevel level, ChunkPos chunkPos, CompoundTag chunkData)
 	{
@@ -349,11 +233,290 @@ public class ChunkLoader
 		readPostPocessings(chunk, chunkData);
 		return chunk;
 	}
+	private static LevelChunkSection[] readSections(LevelAccessor level, ChunkPos chunkPos, CompoundTag chunkData)
+	{
+		#if MC_VER >= MC_1_18_2
+		#if MC_VER < MC_1_19_4
+		Registry<Biome> biomes = level.registryAccess().registryOrThrow(Registry.BIOME_REGISTRY);
+		#else
+		Registry<Biome> biomes = level.registryAccess().registryOrThrow(Registries.BIOME);
+		#endif
+			#if MC_VER < MC_1_18_2
+			Codec<PalettedContainer<Biome>> biomeCodec = PalettedContainer.codec(
+					biomes, biomes.byNameCodec(), PalettedContainer.Strategy.SECTION_BIOMES, biomes.getOrThrow(Biomes.PLAINS));
+			#elif MC_VER < MC_1_19_2
+		Codec<PalettedContainer<Holder<Biome>>> biomeCodec = PalettedContainer.codec(
+				biomes.asHolderIdMap(), biomes.holderByNameCodec(), PalettedContainer.Strategy.SECTION_BIOMES, biomes.getHolderOrThrow(Biomes.PLAINS));
+			#else
+		Codec<PalettedContainer<Holder<Biome>>> biomeCodec = PalettedContainer.codecRW(
+				biomes.asHolderIdMap(), biomes.holderByNameCodec(), PalettedContainer.Strategy.SECTION_BIOMES, biomes.getHolderOrThrow(Biomes.PLAINS));
+			#endif
+		#endif
+		int i = #if MC_VER < MC_1_17_1 16; #else level.getSectionsCount(); #endif
+		LevelChunkSection[] chunkSections = new LevelChunkSection[i];
+		
+		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)
+		{
+			CompoundTag tagSection = tagSections.getCompound(j);
+			int sectionYPos = tagSection.getByte("Y");
+
+			#if MC_VER < MC_1_18_2
+			if (tagSection.contains("Palette", 9) && tagSection.contains("BlockStates", 12))
+			{
+				LevelChunkSection levelChunkSection = new LevelChunkSection(sectionYPos << 4);
+				levelChunkSection.getStates().read(tagSection.getList("Palette", 10),
+						tagSection.getLongArray("BlockStates"));
+				levelChunkSection.recalcBlockCounts();
+				if (!levelChunkSection.isEmpty())
+					chunkSections[#if MC_VER < MC_1_17_1 sectionYPos #else level.getSectionIndexFromSectionY(sectionYPos) #endif ]
+							= levelChunkSection;
+			}
+			#else
+			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;
+				#endif
+				
+				blockStateContainer = tagSection.contains("block_states", 10)
+						? BLOCK_STATE_CODEC.parse(NbtOps.INSTANCE, tagSection.getCompound("block_states")).promotePartial(string -> logErrors(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)
+						: new PalettedContainer<Biome>(biomes, biomes.getOrThrow(Biomes.PLAINS), PalettedContainer.Strategy.SECTION_BIOMES);
+				#else
+				
+				biomeContainer = tagSection.contains("biomes", 10)
+						? biomeCodec.parse(NbtOps.INSTANCE, tagSection.getCompound("biomes")).promotePartial(string -> logErrors(chunkPos, i, (String) string))
+						#if MC_VER < MC_1_20_6 
+						.getOrThrow(false, LOGGER::error)
+						#else
+						.getOrThrow((message) -> (RuntimeException) LOGGER.errorAndThrow(message, null))
+						#endif
+						: new PalettedContainer<Holder<Biome>>(biomes.asHolderIdMap(), biomes.getHolderOrThrow(Biomes.PLAINS), 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);
+				#endif
+			}
+			#endif
+			
+		}
+		return chunkSections;
+	}
+	private static 
+		#if MC_VER < MC_1_20_6 ChunkStatus.ChunkType
+		#elif MC_VER < MC_1_21 ChunkType
+		#else ChunkType #endif 
+	readChunkType(CompoundTag tagLevel)
+	{
+		ChunkStatus chunkStatus = ChunkStatus.byName(tagLevel.getString("Status"));
+		if (chunkStatus != null)
+		{
+			return chunkStatus.getChunkType();
+		}
+		
+		return 
+				#if MC_VER <= MC_1_20_4 ChunkStatus.ChunkType.PROTOCHUNK;
+				#else ChunkType.PROTOCHUNK; #endif
+	}
+	private static void readHeightmaps(LevelChunk chunk, CompoundTag chunkData)
+	{
+		CompoundTag tagHeightmaps = chunkData.getCompound("Heightmaps");
+		for (Heightmap.Types type : ChunkStatus.FULL.heightmapsAfter())
+		{
+			String heightmap = type.getSerializationKey();
+			if (tagHeightmaps.contains(heightmap, 12))
+				chunk.setHeightmap(type, tagHeightmaps.getLongArray(heightmap));
+		}
+		Heightmap.primeHeightmaps(chunk, ChunkStatus.FULL.heightmapsAfter());
+	}
+	private static void readPostPocessings(LevelChunk chunk, CompoundTag chunkData)
+	{
+		ListTag tagPostProcessings = chunkData.getList("PostProcessing", 9);
+		for (int n = 0; n < tagPostProcessings.size(); ++n)
+		{
+			ListTag listTag3 = tagPostProcessings.getList(n);
+			for (int o = 0; o < listTag3.size(); ++o)
+			{
+				chunk.addPackedPostProcess(listTag3.getShort(o), n);
+			}
+		}
+	}
+	#if MC_VER >= MC_1_18_2
+	private static BlendingData readBlendingData(CompoundTag chunkData)
+	{
+		BlendingData blendingData = null;
+		if (chunkData.contains("blending_data", 10))
+		{
+			@SuppressWarnings({"unchecked", "rawtypes"})
+			Dynamic<CompoundTag> blendingDataTag = new Dynamic(NbtOps.INSTANCE, chunkData.getCompound("blending_data"));
+			blendingData = BlendingData.CODEC.parse(blendingDataTag).resultOrPartial(LOGGER::error).orElse(null);
+		}
+		return blendingData;
+	}
+	#endif
+	
+	
+	
+	//=====================//
+	// read chunk lighting //
+	//=====================//
+	
+	/**
+	 * https://minecraft.wiki/w/Chunk_format
+	 */
+	public static CombinedChunkLightStorage readLight(ChunkAccess chunk, CompoundTag chunkData)
+	{
+		#if MC_VER <= MC_1_17_1
+		// MC 1.16 and 1.17 doesn't have the necessary NBT info
+		return null;
+		#else
+		
+		CombinedChunkLightStorage combinedStorage = new CombinedChunkLightStorage(ChunkWrapper.getMinBuildHeight(chunk), ChunkWrapper.getMaxBuildHeight(chunk));
+		ChunkLightStorage blockLightStorage = combinedStorage.blockLightStorage;
+		ChunkLightStorage skyLightStorage = combinedStorage.skyLightStorage;
+		
+		boolean foundSkyLight = false;
+		
+		
+		
+		//===================//
+		// get NBT tags info //
+		//===================//
+		
+		Tag chunkSectionTags = chunkData.get("sections");
+		if (chunkSectionTags == null)
+		{
+			if (!lightingSectionErrorLogged)
+			{
+				lightingSectionErrorLogged = true;
+				LOGGER.error("No sections found for chunk at pos ["+chunk.getPos()+"] chunk data may be out of date.");
+			}
+			return null;
+		}
+		else if (!(chunkSectionTags instanceof ListTag))
+		{
+			if (!lightingSectionErrorLogged)
+			{
+				lightingSectionErrorLogged = true;
+				LOGGER.error("Chunk section tag list have unexpected type ["+chunkSectionTags.getClass().getName()+"], expected ["+ListTag.class.getName()+"].");
+			}
+			return null;
+		}
+		ListTag chunkSectionListTag = (ListTag) chunkSectionTags;
+		
+		
+		
+		//===================//
+		// get lighting info //
+		//===================//
+		
+		for (int sectionIndex = 0; sectionIndex < chunkSectionListTag.size(); sectionIndex++)
+		{
+			Tag chunkSectionTag = chunkSectionListTag.get(sectionIndex);
+			if (!(chunkSectionTag instanceof CompoundTag))
+			{
+				if (!lightingSectionErrorLogged)
+				{
+					lightingSectionErrorLogged = true;
+					LOGGER.error("Chunk section tag has an unexpected type ["+chunkSectionTag.getClass().getName()+"], expected ["+CompoundTag.class.getName()+"].");
+				}
+				return null;
+			}
+			CompoundTag chunkSectionCompoundTag = (CompoundTag) chunkSectionTag;
+			
+			
+			// if null all lights = 0
+			byte[] blockLightNibbleArray = chunkSectionCompoundTag.getByteArray("BlockLight");
+			byte[] skyLightNibbleArray = chunkSectionCompoundTag.getByteArray("SkyLight");
+			
+			// if any sky light was found then all lights above will be max brightness
+			if (skyLightNibbleArray.length != 0)
+			{
+				foundSkyLight = true;
+			}
+			
+			for (int relX = 0; relX < LodUtil.CHUNK_WIDTH; relX++)
+			{
+				for (int relZ = 0; relZ < LodUtil.CHUNK_WIDTH; relZ++)
+				{
+					// chunk sections are also 16 blocks tall
+					for (int relY = 0; relY < LodUtil.CHUNK_WIDTH; relY++)
+					{
+						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.getMinBuildHeight(chunk);
+						blockLightStorage.set(relX, y, relZ, blockLight);
+						skyLightStorage.set(relX, y, relZ, skyLight);
+					}
+				}
+			}
+		}
+		
+		return combinedStorage;
+		#endif
+	}
+	/** source: https://minecraft.wiki/w/Chunk_format#Block_Format */
+	private static byte getNibbleAtIndex(byte[] arr, int index)
+	{
+		if (index % 2 == 0)
+		{
+			return (byte)(arr[index/2] & 0x0F);
+		}
+		else
+		{
+			return (byte)((arr[index/2]>>4) & 0x0F);
+		}
+	}
 	
 	private static void logErrors(ChunkPos chunkPos, int i, String string)
 	{
 		LOGGER.error("Distant Horizons: Recoverable errors when loading section [" + chunkPos.x + ", " + i + ", " + chunkPos.z + "]: " + string);
 	}
 	
+	
+	
+	//================//
+	// helper classes //
+	//================//
+	
+	public static class CombinedChunkLightStorage
+	{
+		public ChunkLightStorage blockLightStorage;
+		public ChunkLightStorage skyLightStorage;
+		
+		public CombinedChunkLightStorage(int minY, int maxY)
+		{
+			this.blockLightStorage = ChunkLightStorage.createBlockLightStorage(minY, maxY);
+			this.skyLightStorage = ChunkLightStorage.createSkyLightStorage(minY, maxY);
+		}
+	}
+	
 }
 

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

@@ -0,0 +1,23 @@
+package com.seibel.distanthorizons.common.wrappers.worldGeneration.mimicObject;
+
+#if MC_VER >= MC_1_21
+
+import net.minecraft.server.level.GenerationChunkHolder;
+import net.minecraft.world.level.ChunkPos;
+
+public class DhGenerationChunkHolder extends GenerationChunkHolder
+{
+	
+	public DhGenerationChunkHolder(ChunkPos pos)
+	{
+		super(pos);
+	}
+	
+	@Override 
+	public int getTicketLevel() { return 0; }
+	@Override 
+	public int getQueueLevel() { return 0; }
+	
+}
+
+#endif

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

@@ -20,9 +20,10 @@
 package com.seibel.distanthorizons.common.wrappers.worldGeneration.mimicObject;
 
 import java.lang.invoke.MethodHandles;
+import java.util.EnumSet;
 import java.util.List;
 import java.util.concurrent.locks.ReentrantLock;
-
+import com.seibel.distanthorizons.common.wrappers.chunk.ChunkWrapper;
 import com.seibel.distanthorizons.common.wrappers.worldGeneration.BatchGenerationEnvironment;
 import com.seibel.distanthorizons.core.logging.DhLoggerBuilder;
 import com.seibel.distanthorizons.core.util.LodUtil;
@@ -59,7 +60,13 @@ import net.minecraft.world.level.lighting.LevelLightEngine;
 #if MC_VER <= MC_1_20_4
 import net.minecraft.world.level.chunk.ChunkStatus;
 #else
-import net.minecraft.world.level.chunk.status.ChunkStatus;
+import net.minecraft.world.level.chunk.status.*;
+#endif
+
+#if MC_VER == MC_1_21
+import net.minecraft.util.StaticCache2D;
+import com.google.common.collect.ImmutableList;
+import net.minecraft.server.level.GenerationChunkHolder;
 #endif
 
 
@@ -71,7 +78,7 @@ public class DhLitWorldGenRegion extends WorldGenRegion
 	
 	
 	public final DummyLightEngine lightEngine;
-	public final BatchGenerationEnvironment.EmptyChunkGenerator generator;
+	public final BatchGenerationEnvironment.IEmptyChunkGeneratorFunc generator;
 	public final int writeRadius;
 	public final int size;
 	
@@ -112,11 +119,29 @@ public class DhLitWorldGenRegion extends WorldGenRegion
 	
 	
 	public DhLitWorldGenRegion(
+			int centerChunkX, int centerChunkZ,
+			ChunkAccess centerChunk,
 			ServerLevel serverLevel, DummyLightEngine lightEngine,
 			List<ChunkAccess> chunkList, ChunkStatus chunkStatus, int writeRadius,
-			BatchGenerationEnvironment.EmptyChunkGenerator generator)
+			BatchGenerationEnvironment.IEmptyChunkGeneratorFunc generator)
 	{
-		super(serverLevel, chunkList #if MC_VER >= MC_1_17_1 , chunkStatus, writeRadius #endif );
+		#if MC_VER == MC_1_16_5
+		super(serverLevel, chunkList);
+		#elif MC_VER < MC_1_21
+		super(serverLevel, chunkList, chunkStatus, writeRadius);
+		#else
+		super(serverLevel, 
+				StaticCache2D.create(
+					centerChunkX, centerChunkZ,
+					writeRadius * 2, (x,z) -> new DhGenerationChunkHolder(new ChunkPos(x, z))), 
+				new ChunkStep(chunkStatus,
+						// reverse is needed because MC uses the index of the chunkStatus to determine how many items are in the list instead of the actual list count
+						new ChunkDependencies(ImmutableList.copyOf(ChunkStatus.getStatusList()).reverse()),
+						new ChunkDependencies(ImmutableList.copyOf(ChunkStatus.getStatusList()).reverse()),
+						writeRadius, (WorldGenContext var1, ChunkStep var2, StaticCache2D<GenerationChunkHolder> var3, ChunkAccess var4) -> null),
+				centerChunk);
+		
+		#endif
 		this.firstPos = chunkList.get(0).getPos();
 		this.generator = generator;
 		this.lightEngine = lightEngine;
@@ -280,7 +305,7 @@ public class DhLitWorldGenRegion extends WorldGenRegion
 	private ChunkAccess getChunkAccess(int chunkX, int chunkZ, ChunkStatus chunkStatus, boolean returnNonNull)
 	{
 		ChunkAccess chunk = this.superHasChunk(chunkX, chunkZ) ? this.superGetChunk(chunkX, chunkZ) : null;
-		if (chunk != null && chunk.getStatus().isOrAfter(chunkStatus))
+		if (chunk != null && ChunkWrapper.getStatus(chunk).isOrAfter(chunkStatus))
 		{
 			return chunk;
 		}

common/src/main/java/com/seibel/distanthorizons/common/wrappers/worldGeneration/step/StepBiomes.java

@@ -56,29 +56,39 @@ public final class StepBiomes
 			List<ChunkWrapper> chunkWrappers)
 	{
 		
-		ArrayList<ChunkAccess> chunksToDo = new ArrayList<ChunkAccess>();
+		ArrayList<ChunkAccess> chunksToDo = new ArrayList<>();
 		
 		for (ChunkWrapper chunkWrapper : chunkWrappers)
 		{
 			ChunkAccess chunk = chunkWrapper.getChunk();
-			if (chunk.getStatus().isOrAfter(STATUS)) continue;
-			((ProtoChunk) chunk).setStatus(STATUS);
-			chunksToDo.add(chunk);
+			if (!chunkWrapper.getStatus().isOrAfter(STATUS))
+			{
+				#if MC_VER < MC_1_21
+				((ProtoChunk) chunk).setStatus(STATUS);
+				#else
+				((ProtoChunk) chunk).setPersistedStatus(STATUS);
+				#endif
+				
+				chunksToDo.add(chunk);
+			}
 		}
 		
 		for (ChunkAccess chunk : chunksToDo)
 		{
 			// System.out.println("StepBiomes: "+chunk.getPos());
 			#if MC_VER < MC_1_18_2
-			environment.params.generator.createBiomes(environment.params.biomes, chunk);
+			this.environment.params.generator.createBiomes(this.environment.params.biomes, chunk);
 			#elif MC_VER < MC_1_19_2
-			chunk = environment.joinSync(environment.params.generator.createBiomes(environment.params.biomes, Runnable::run, Blender.of(worldGenRegion),
+			chunk = this.environment.joinSync(this.environment.params.generator.createBiomes(this.environment.params.biomes, Runnable::run, Blender.of(worldGenRegion),
 					tParams.structFeat.forWorldGenRegion(worldGenRegion), chunk));
 			#elif MC_VER < MC_1_19_4
-			chunk = environment.joinSync(environment.params.generator.createBiomes(environment.params.biomes, Runnable::run, environment.params.randomState, Blender.of(worldGenRegion),
+			chunk = this.environment.joinSync(this.environment.params.generator.createBiomes(this.environment.params.biomes, Runnable::run, this.environment.params.randomState, Blender.of(worldGenRegion),
+					tParams.structFeat.forWorldGenRegion(worldGenRegion), chunk));
+			#elif MC_VER < MC_1_21
+			chunk = this.environment.joinSync(this.environment.params.generator.createBiomes(Runnable::run, this.environment.params.randomState, Blender.of(worldGenRegion),
 					tParams.structFeat.forWorldGenRegion(worldGenRegion), chunk));
 			#else
-			chunk = environment.joinSync(environment.params.generator.createBiomes(Runnable::run, environment.params.randomState, Blender.of(worldGenRegion),
+			chunk = this.environment.joinSync(this.environment.params.generator.createBiomes(this.environment.params.randomState, Blender.of(worldGenRegion),
 					tParams.structFeat.forWorldGenRegion(worldGenRegion), chunk));
 			#endif
 		}

common/src/main/java/com/seibel/distanthorizons/common/wrappers/worldGeneration/step/StepFeatures.java

@@ -59,14 +59,14 @@ public final class StepFeatures
 		for (ChunkWrapper chunkWrapper : chunkWrappers)
 		{
 			ChunkAccess chunk = chunkWrapper.getChunk();
-			if (chunk.getStatus().isOrAfter(STATUS))
-			{
-				continue;
-			}
-			
-			if (chunk instanceof ProtoChunk)
+			if (!chunkWrapper.getStatus().isOrAfter(STATUS)
+				&& chunk instanceof ProtoChunk)
 			{
+				#if MC_VER < MC_1_21
 				((ProtoChunk) chunk).setStatus(STATUS);
+				#else
+				((ProtoChunk) chunk).setPersistedStatus(STATUS);
+				#endif
 			}
 			
 			

common/src/main/java/com/seibel/distanthorizons/common/wrappers/worldGeneration/step/StepNoise.java

@@ -58,13 +58,21 @@ public final class StepNoise
 			List<ChunkWrapper> chunkWrappers)
 	{
 		
-		ArrayList<ChunkAccess> chunksToDo = new ArrayList<ChunkAccess>();
+		ArrayList<ChunkAccess> chunksToDo = new ArrayList<>();
 		
 		for (ChunkWrapper chunkWrapper : chunkWrappers)
 		{
 			ChunkAccess chunk = chunkWrapper.getChunk();
-			if (chunk.getStatus().isOrAfter(STATUS)) continue;
+			if (chunkWrapper.getStatus().isOrAfter(STATUS))
+			{
+				continue;
+			}
+			
+			#if MC_VER < MC_1_21
 			((ProtoChunk) chunk).setStatus(STATUS);
+			#else
+			((ProtoChunk) chunk).setPersistedStatus(STATUS);
+			#endif
 			chunksToDo.add(chunk);
 		}
 		
@@ -72,15 +80,18 @@ public final class StepNoise
 		{
 			// System.out.println("StepNoise: "+chunk.getPos());
 			#if MC_VER < MC_1_17_1
-			environment.params.generator.fillFromNoise(worldGenRegion, tParams.structFeat, chunk);
+			this.environment.params.generator.fillFromNoise(worldGenRegion, tParams.structFeat, chunk);
 			#elif MC_VER < MC_1_18_2
-			chunk = environment.joinSync(environment.params.generator.fillFromNoise(Runnable::run,
+			chunk = this.environment.joinSync(this.environment.params.generator.fillFromNoise(Runnable::run,
 					tParams.structFeat.forWorldGenRegion(worldGenRegion), chunk));
 			#elif MC_VER < MC_1_19_2
-			chunk = environment.joinSync(environment.params.generator.fillFromNoise(Runnable::run, Blender.of(worldGenRegion),
+			chunk = this.environment.joinSync(this.environment.params.generator.fillFromNoise(Runnable::run, Blender.of(worldGenRegion),
+					tParams.structFeat.forWorldGenRegion(worldGenRegion), chunk));
+			#elif MC_VER < MC_1_21
+			chunk = this.environment.joinSync(this.environment.params.generator.fillFromNoise(Runnable::run, Blender.of(worldGenRegion), this.environment.params.randomState,
 					tParams.structFeat.forWorldGenRegion(worldGenRegion), chunk));
 			#else
-			chunk = environment.joinSync(environment.params.generator.fillFromNoise(Runnable::run, Blender.of(worldGenRegion), environment.params.randomState,
+			chunk = this.environment.joinSync(this.environment.params.generator.fillFromNoise(Blender.of(worldGenRegion), this.environment.params.randomState,
 					tParams.structFeat.forWorldGenRegion(worldGenRegion), chunk));
 			#endif
 			UncheckedInterruptedException.throwIfInterrupted();

common/src/main/java/com/seibel/distanthorizons/common/wrappers/worldGeneration/step/StepStructureReference.java

@@ -59,9 +59,15 @@ public final class StepStructureReference
 		for (ChunkWrapper chunkWrapper : chunkWrappers)
 		{
 			ChunkAccess chunk = chunkWrapper.getChunk();
-			if (chunk.getStatus().isOrAfter(STATUS)) continue;
-			((ProtoChunk) chunk).setStatus(STATUS);
-			chunksToDo.add(chunk);
+			if (!chunkWrapper.getStatus().isOrAfter(STATUS))
+			{
+				#if MC_VER < MC_1_21
+				((ProtoChunk) chunk).setStatus(STATUS);
+				#else
+				((ProtoChunk) chunk).setPersistedStatus(STATUS);
+				#endif
+				chunksToDo.add(chunk);
+			}
 		}
 		
 		for (ChunkAccess chunk : chunksToDo)

common/src/main/java/com/seibel/distanthorizons/common/wrappers/worldGeneration/step/StepStructureStart.java

@@ -76,9 +76,13 @@ public final class StepStructureStart
 		for (ChunkWrapper chunkWrapper : chunkWrappers)
 		{
 			ChunkAccess chunk = chunkWrapper.getChunk();
-			if (!chunk.getStatus().isOrAfter(STATUS))
+			if (!chunkWrapper.getStatus().isOrAfter(STATUS))
 			{
+				#if MC_VER < MC_1_21
 				((ProtoChunk) chunk).setStatus(STATUS);
+				#else
+				((ProtoChunk) chunk).setPersistedStatus(STATUS);
+				#endif
 				chunksToDo.add(chunk);
 			}
 		}

common/src/main/java/com/seibel/distanthorizons/common/wrappers/worldGeneration/step/StepSurface.java

@@ -58,9 +58,16 @@ public final class StepSurface
 		for (ChunkWrapper chunkWrapper : chunkWrappers)
 		{
 			ChunkAccess chunk = chunkWrapper.getChunk();
-			if (chunk.getStatus().isOrAfter(STATUS)) continue;
-			((ProtoChunk) chunk).setStatus(STATUS);
-			chunksToDo.add(chunk);
+			if (!chunkWrapper.getStatus().isOrAfter(STATUS))
+			{
+				#if MC_VER < MC_1_21
+				((ProtoChunk) chunk).setStatus(STATUS);
+				#else
+				((ProtoChunk) chunk).setPersistedStatus(STATUS);
+				#endif
+				
+				chunksToDo.add(chunk);
+			}
 		}
 		
 		for (ChunkAccess chunk : chunksToDo)

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

@@ -208,7 +208,12 @@ public class FabricClientProxy implements AbstractModInitializer.IEventProxy
 			this.clientApi.renderLods(ClientLevelWrapper.getWrapper(renderContext.world()),
 					modelViewMatrix,
 					projectionMatrix,
-					renderContext.tickDelta());
+					#if MC_VER < MC_1_21
+					renderContext.tickDelta()
+					#else
+					renderContext.tickCounter().getGameTimeDeltaTicks()
+					#endif
+					);
 		});
 
 		// Debug keyboard event

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

@@ -120,7 +120,12 @@ public class MixinLevelRenderer
 		    ClientApi.INSTANCE.renderDeferredLods(ClientLevelWrapper.getWrapper(this.level),
 				    mcModelViewMatrix,
 				    mcProjectionMatrix,
-				    Minecraft.getInstance().getFrameTime());
+					#if MC_VER < MC_1_21
+					Minecraft.getInstance().getFrameTime()
+					#else
+				    Minecraft.getInstance().getTimer().getRealtimeDeltaTicks()
+					#endif
+				    );
 	    }
 		
 		// FIXME completely disables rendering when sodium is installed

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

@@ -8,6 +8,7 @@ import com.seibel.distanthorizons.core.jar.installer.GitlabGetter;
 import com.seibel.distanthorizons.core.jar.installer.ModrinthGetter;
 import com.seibel.distanthorizons.core.jar.updater.SelfUpdater;
 import com.seibel.distanthorizons.core.wrapperInterfaces.IVersionConstants;
+import com.seibel.distanthorizons.coreapi.ModInfo;
 import net.minecraft.client.gui.screens.Screen;
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.gui.screens.TitleScreen;
@@ -87,13 +88,23 @@ public class MixinMinecraft
 				)
 			)
 		{
-			runnable = () -> {
+			runnable = () -> 
+			{
+				String versionId;
+				EDhApiUpdateBranch updateBranch = EDhApiUpdateBranch.convertAutoToStableOrNightly(Config.Client.Advanced.AutoUpdater.updateBranch.get());
+				if (updateBranch == EDhApiUpdateBranch.STABLE)
+				{
+					versionId = ModrinthGetter.getLatestIDForVersion(SingletonInjector.INSTANCE.get(IVersionConstants.class).getMinecraftVersion());
+				}
+				else
+				{
+					versionId = GitlabGetter.INSTANCE.projectPipelines.get(0).get("sha");
+				}
+				
 				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
-						(Config.Client.Advanced.AutoUpdater.updateBranch.get() == EDhApiUpdateBranch.STABLE 
-							? ModrinthGetter.getLatestIDForVersion(SingletonInjector.INSTANCE.get(IVersionConstants.class).getMinecraftVersion())
-							: GitlabGetter.INSTANCE.projectPipelines.get(0).get("sha"))
+						versionId
 				));
 			};
 		}

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

@@ -23,16 +23,13 @@ import com.seibel.distanthorizons.common.wrappers.gui.GetConfigScreen;
 import com.seibel.distanthorizons.common.wrappers.gui.TexturedButtonWidget;
 import com.seibel.distanthorizons.coreapi.ModInfo;
 import com.seibel.distanthorizons.core.config.Config;
-import net.minecraft.client.gui.screens.OptionsScreen;
 import net.minecraft.client.gui.screens.Screen;
 import net.minecraft.network.chat.Component;
 #if MC_VER < MC_1_19_2
 import net.minecraft.network.chat.TranslatableComponent;
 #endif
 import net.minecraft.resources.ResourceLocation;
-import org.spongepowered.asm.mixin.Final;
 import org.spongepowered.asm.mixin.Mixin;
-import org.spongepowered.asm.mixin.Shadow;
 import org.spongepowered.asm.mixin.Unique;
 import org.spongepowered.asm.mixin.injection.At;
 import org.spongepowered.asm.mixin.injection.Inject;
@@ -41,11 +38,20 @@ import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
 import java.util.Objects;
 import java.util.concurrent.atomic.AtomicInteger;
 
-#if MC_VER == MC_1_20_6
+#if MC_VER >= MC_1_20_6
 import net.minecraft.client.gui.layouts.LinearLayout;
 import net.minecraft.client.gui.layouts.HeaderAndFooterLayout;
+import org.spongepowered.asm.mixin.Final;
+import org.spongepowered.asm.mixin.Shadow;
 #endif
 
+#if MC_VER < MC_1_21
+import net.minecraft.client.gui.screens.OptionsScreen;
+#else
+import net.minecraft.client.gui.screens.options.OptionsScreen;
+#endif
+
+
 /**
  * Adds a button to the menu to goto the config
  *
@@ -57,13 +63,18 @@ public class MixinOptionsScreen extends Screen
 {
 	/** Texture used for the config opening button */
 	@Unique
-	private static final ResourceLocation ICON_TEXTURE = new ResourceLocation(ModInfo.ID, "textures/gui/button.png");
+	private static final ResourceLocation ICON_TEXTURE =
+		#if MC_VER < MC_1_21
+		new ResourceLocation(ModInfo.ID, "textures/gui/button.png");
+		#else
+		ResourceLocation.fromNamespaceAndPath(ModInfo.ID, "textures/gui/button.png");
+		#endif 
 	
 	
 	@Unique
 	private TexturedButtonWidget optionsButton = null;
 	
-	#if MC_VER == MC_1_20_6
+	#if MC_VER >= MC_1_20_6
 	@Shadow
 	@Final
 	protected HeaderAndFooterLayout layout;

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

@@ -5,7 +5,7 @@ import com.seibel.distanthorizons.core.wrapperInterfaces.modAccessor.IBCLibAcces
 #elif MC_VER == MC_1_18_2
 import ru.bclib.config.ClientConfig;
 import ru.bclib.config.Configs;
-#else
+#elif MC_VER < MC_1_21
 import org.betterx.bclib.config.ClientConfig;
 import org.betterx.bclib.config.Configs;
 #endif
@@ -17,7 +17,8 @@ public class BCLibAccessor implements IBCLibAccessor
 	
 	public void setRenderCustomFog(boolean newValue)
 	{
-		#if !(MC_VER == MC_1_16_5 || MC_VER == MC_1_17_1 || MC_VER == MC_1_20_4 || MC_VER == MC_1_20_6) // These versions either don't have BCLib, or the implementation is different
+		// only some MC versions have BCLib and require this fix
+		#if (MC_VER > MC_1_17_1 && MC_VER < MC_1_20_4)
 		
 		// Change the value of CUSTOM_FOG_RENDERING in the bclib client config
 		// This disabled fog from rendering within bclib

fabric/src/main/resources/fabric.mod.json

@@ -56,7 +56,6 @@
     },
     
     "suggests": {
-        "blendium": "*"
     },
     
     "breaks": $fabric_incompatibility_list,

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

@@ -144,7 +144,7 @@ public class ForgeClientProxy implements AbstractModInitializer.IEventProxy
 	#if MC_VER < MC_1_19_2
 	public void clientLevelUnloadEvent(WorldEvent.Unload event)
 	#else
-	public void clientLevelUnloadEvent(LevelEvent.Load event)
+	public void clientLevelUnloadEvent(LevelEvent.Unload event)
 	#endif
 	{
 		LOGGER.info("level unload");

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

@@ -73,11 +73,23 @@ public class MixinMinecraft
 				&& SelfUpdater.onStart()
 		)
 		{
-			runnable = () -> {
+			runnable = () -> 
+			{
+				String versionId;
+				EDhApiUpdateBranch updateBranch = EDhApiUpdateBranch.convertAutoToStableOrNightly(Config.Client.Advanced.AutoUpdater.updateBranch.get());
+				if (updateBranch == EDhApiUpdateBranch.STABLE)
+				{
+					versionId = ModrinthGetter.getLatestIDForVersion(SingletonInjector.INSTANCE.get(IVersionConstants.class).getMinecraftVersion());
+				}
+				else
+				{
+					versionId = GitlabGetter.INSTANCE.projectPipelines.get(0).get("sha");
+				}
+				
 				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
-						(Config.Client.Advanced.AutoUpdater.updateBranch.get() == EDhApiUpdateBranch.STABLE ? ModrinthGetter.getLatestIDForVersion(SingletonInjector.INSTANCE.get(IVersionConstants.class).getMinecraftVersion()) : GitlabGetter.INSTANCE.projectPipelines.get(0).get("sha"))
+						versionId
 				));
 			};
 		}

gradle.properties

@@ -5,8 +5,8 @@ org.gradle.caching=true
 
 # Mod Info
 mod_name=DistantHorizons
-mod_version=2.1.0-a
-api_version=2.0.0
+mod_version=2.1.2-a
+api_version=2.1.0
 maven_group=com.seibel.distanthorizons
 mod_readable_name=Distant Horizons
 mod_description=This mod generates and renders simplified terrain beyond the normal view distance at a low performance cost. Allowing you to see much farther without turning your game into a slideshow.
@@ -49,7 +49,7 @@ versionStr=
 
 # This defines what MC version Intellij will use for the preprocessor
 # and what version is used automatically by build and run commands
-mcVer=1.20.6
+mcVer=1.21
 
 # Defines the maximum amount of memory Minecraft is allowed when run in a development environment
 #minecraftMemoryJavaArg="-Xmx4G"

neoforge/build.gradle

@@ -11,43 +11,19 @@ architectury {
     neoForge()
 }
 
-// TODO this is already defined in the main settings.gradle file, why doesn't it work unless also defined here? (If compiling does work without this block feel free to remove)
-repositories {
-    maven {
-        name "Neoforge"
-        url "https://maven.neoforged.net/releases/"
-    }
-}
-
-//loom {
-//    forge {
-//        convertAccessWideners.set(true)
-//        extraAccessWideners.add("lod.accesswidener")
-//        mixinConfigs("DistantHorizons.mixins.json")
-//    }
-//}
-
 loom {
     silentMojangMappingsLicense() // Shut the licencing warning
     accessWidenerPath = project(":common").file("src/main/resources/${accessWidenerVersion}.distanthorizons.accesswidener")
 
     neoForge {
-        // Access wideners are now defined in the `remapJar.atAccessWideners`
-//        convertAccessWideners = true
-//        extraAccessWideners.add loom.accessWidenerPath.get().asFile.name
+        // Access wideners are defined in the `remapJar.atAccessWideners`
 
-        // Mixins are now defined in the `mods.toml`
-//        mixinConfigs = [
-//                "DistantHorizons.mixins.json"
-//        ]
+        // Mixins are defined in the `mods.toml`
     }
     mixin {
-        // Mixins are now defined in the `mods.toml`
-//        mixinConfigs = [
-//                "DistantHorizons.mixins.json"
-//        ]
+        // Mixins are defined in the `mods.toml`
     }
-
+    
     // "runs" isn't required, but when we do need it then it can be useful
     runs {
         client {
@@ -55,7 +31,7 @@ loom {
             setConfigName("NeoForge Client")
             ideConfigGenerated(true)
             runDir("../run")
-//            vmArgs("-XX:-OmitStackTraceInFastThrow", minecraftMemoryJavaArg)
+            //vmArgs("-XX:-OmitStackTraceInFastThrow", minecraftMemoryJavaArg)
         }
         server {
             server()
@@ -66,13 +42,7 @@ loom {
     }
 }
 
-remapJar {
-    inputFile = shadowJar.archiveFile
-    dependsOn shadowJar
-//    classifier null
 
-    atAccessWideners.add("distanthorizons.accesswidener")
-}
 
 def addMod(path, enabled) {
     if (enabled == "2")
@@ -80,21 +50,24 @@ def addMod(path, enabled) {
     else if (enabled == "1")
         dependencies { modCompileOnly(path) }
 }
-
 dependencies {
     minecraft "com.mojang:minecraft:${rootProject.minecraft_version}"
-    mappings loom.layered() {
+    mappings loom.layered() 
+    {
         // Mojmap mappings
         officialMojangMappings()
         // Parchment mappings (it adds parameter mappings & javadoc)
         parchment("org.parchmentmc.data:parchment-${rootProject.parchment_version}@zip")
     }
-
+    
+    
     // Neoforge
     neoForge "net.neoforged:neoforge:${rootProject.neoforge_version}"
     addMod("curse.maven:TerraFirmaCraft-302973:4616004", rootProject.enable_terrafirmacraft)
 }
 
+
+
 task deleteResources(type: Delete) {
     delete file("build/resources/main")
 }
@@ -113,14 +86,15 @@ tasks.named('runClient') {
     finalizedBy(deleteResources)
 }
 
+remapJar {
+    inputFile = shadowJar.archiveFile
+    dependsOn shadowJar
+
+    atAccessWideners.add("distanthorizons.accesswidener")
+}
+
 sourcesJar {
     def commonSources = project(":common").sourcesJar
     dependsOn commonSources
     from commonSources.archiveFile.map { zipTree(it) }
 }
-
-//components.java {
-//    withVariantsFromConfiguration(project.configurations.shadowRuntimeElements) {
-//        skip()
-//    }
-//}

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

@@ -140,7 +140,7 @@ public class NeoforgeClientProxy implements AbstractModInitializer.IEventProxy
 		ClientApi.INSTANCE.clientLevelLoadEvent(clientLevelWrapper);
 	}
 	@SubscribeEvent
-	public void clientLevelUnloadEvent(LevelEvent.Load event)
+	public void clientLevelUnloadEvent(LevelEvent.Unload event)
 	{
 		LOGGER.info("level unload");
 		

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

@@ -98,7 +98,6 @@ public class MixinLevelRenderer
 	private void renderChunkLayer(RenderType renderType, double x, double y, double z, Matrix4f projectionMatrix, Matrix4f frustumMatrix, CallbackInfo callback)
 	#endif
 	{
-		// get MC's model view and projection matrices
 		#if MC_VER == MC_1_16_5
 		// get the matrices from the OpenGL fixed pipeline
 		float[] mcProjMatrixRaw = new float[16];
@@ -120,15 +119,21 @@ public class MixinLevelRenderer
 		#endif
 		
 		
+		float frameTime;
+		#if MC_VER < MC_1_21
+		frameTime = Minecraft.getInstance().getFrameTime();
+		#else
+		frameTime = Minecraft.getInstance().getTimer().getRealtimeDeltaTicks();
+		#endif
 		
 		// only render before solid blocks
 		if (renderType.equals(RenderType.solid()))
 		{
-			ClientApi.INSTANCE.renderLods(ClientLevelWrapper.getWrapper(this.level), mcModelViewMatrix, mcProjectionMatrix, Minecraft.getInstance().getFrameTime());
+			ClientApi.INSTANCE.renderLods(ClientLevelWrapper.getWrapper(this.level), mcModelViewMatrix, mcProjectionMatrix, frameTime);
 		} 
 		else if (renderType.equals(RenderType.translucent())) 
 		{
-			ClientApi.INSTANCE.renderDeferredLods(ClientLevelWrapper.getWrapper(this.level), mcModelViewMatrix, mcProjectionMatrix, Minecraft.getInstance().getFrameTime());
+			ClientApi.INSTANCE.renderDeferredLods(ClientLevelWrapper.getWrapper(this.level), mcModelViewMatrix, mcProjectionMatrix, frameTime);
 		}
 		
 		if (Config.Client.Advanced.Debugging.lodOnlyMode.get())
@@ -154,4 +159,5 @@ public class MixinLevelRenderer
 		ChunkWrapper.syncedUpdateClientLightStatus();
 	}
 	
+	
 }

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

@@ -8,6 +8,7 @@ import com.seibel.distanthorizons.core.jar.installer.GitlabGetter;
 import com.seibel.distanthorizons.core.jar.installer.ModrinthGetter;
 import com.seibel.distanthorizons.core.jar.updater.SelfUpdater;
 import com.seibel.distanthorizons.core.wrapperInterfaces.IVersionConstants;
+import com.seibel.distanthorizons.coreapi.ModInfo;
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.gui.screens.TitleScreen;
 import org.spongepowered.asm.mixin.Mixin;
@@ -75,11 +76,23 @@ public class MixinMinecraft
 				&& SelfUpdater.onStart()
 		)
 		{
-			runnable = () -> {
+			runnable = () -> 
+			{
+				String versionId;
+				EDhApiUpdateBranch updateBranch = EDhApiUpdateBranch.convertAutoToStableOrNightly(Config.Client.Advanced.AutoUpdater.updateBranch.get());
+				if (updateBranch == EDhApiUpdateBranch.STABLE)
+				{
+					versionId = ModrinthGetter.getLatestIDForVersion(SingletonInjector.INSTANCE.get(IVersionConstants.class).getMinecraftVersion());
+				}
+				else
+				{
+					versionId = GitlabGetter.INSTANCE.projectPipelines.get(0).get("sha");
+				}
+				
 				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
-						(Config.Client.Advanced.AutoUpdater.updateBranch.get() == EDhApiUpdateBranch.STABLE ? ModrinthGetter.getLatestIDForVersion(SingletonInjector.INSTANCE.get(IVersionConstants.class).getMinecraftVersion()) : GitlabGetter.INSTANCE.projectPipelines.get(0).get("sha"))
+						versionId
 				));
 			};
 		}

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

@@ -23,16 +23,13 @@ import com.seibel.distanthorizons.common.wrappers.gui.GetConfigScreen;
 import com.seibel.distanthorizons.common.wrappers.gui.TexturedButtonWidget;
 import com.seibel.distanthorizons.coreapi.ModInfo;
 import com.seibel.distanthorizons.core.config.Config;
-import net.minecraft.client.gui.screens.OptionsScreen;
 import net.minecraft.client.gui.screens.Screen;
 import net.minecraft.network.chat.Component;
 #if MC_VER < MC_1_19_2
 import net.minecraft.network.chat.TranslatableComponent;
 #endif
 import net.minecraft.resources.ResourceLocation;
-import org.spongepowered.asm.mixin.Final;
 import org.spongepowered.asm.mixin.Mixin;
-import org.spongepowered.asm.mixin.Shadow;
 import org.spongepowered.asm.mixin.Unique;
 import org.spongepowered.asm.mixin.injection.At;
 import org.spongepowered.asm.mixin.injection.Inject;
@@ -41,11 +38,20 @@ import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
 import java.util.Objects;
 import java.util.concurrent.atomic.AtomicInteger;
 
-#if MC_VER == MC_1_20_6
+#if MC_VER >= MC_1_20_6
 import net.minecraft.client.gui.layouts.LinearLayout;
 import net.minecraft.client.gui.layouts.HeaderAndFooterLayout;
+import org.spongepowered.asm.mixin.Final;
+import org.spongepowered.asm.mixin.Shadow;
 #endif
 
+#if MC_VER < MC_1_21
+import net.minecraft.client.gui.screens.OptionsScreen;
+#else
+import net.minecraft.client.gui.screens.options.OptionsScreen;
+#endif
+
+
 /**
  * Adds a button to the menu to goto the config
  *
@@ -57,13 +63,18 @@ public class MixinOptionsScreen extends Screen
 {
 	/** Texture used for the config opening button */
 	@Unique
-	private static final ResourceLocation ICON_TEXTURE = new ResourceLocation(ModInfo.ID, "textures/gui/button.png");
+	private static final ResourceLocation ICON_TEXTURE =
+		#if MC_VER < MC_1_21
+		new ResourceLocation(ModInfo.ID, "textures/gui/button.png");
+		#else
+			ResourceLocation.fromNamespaceAndPath(ModInfo.ID, "textures/gui/button.png");
+		#endif
 	
 	
 	@Unique
 	private TexturedButtonWidget optionsButton = null;
 	
-	#if MC_VER == MC_1_20_6
+	#if MC_VER >= MC_1_20_6
 	@Shadow
 	@Final
 	protected HeaderAndFooterLayout layout;
@@ -93,7 +104,6 @@ public class MixinOptionsScreen extends Screen
 			
 			// add the button to the correct location in the UI
 			// TODO is there a better way to do this instead of using access transformers to inject into the exact UI elements?
-			// TODO is there a way we can put the button on the left side of the FOV bar like before?
 			LinearLayout layout = (LinearLayout) this.layout.headerFrame.children.get(0).child;
 			
 			// determine how wide the other option buttons are so we can put our botton to the left of them all

versionProperties/1.21.properties

@@ -0,0 +1,53 @@
+# 1.21 version
+java_version=21
+minecraft_version=1.21
+parchment_version=1.20.6:2024.05.01
+compatible_minecraft_versions=["1.21.0"]
+accessWidenerVersion=1_20_6
+builds_for=fabric,neoforge
+# forge is broken due to gradle/build script issues
+
+# Fabric loader
+fabric_loader_version=0.15.11
+fabric_api_version=0.100.1+1.21
+    # Fabric mod versions
+    modmenu_version=11.0.0-beta.1
+    starlight_version_fabric=
+    phosphor_version_fabric=
+    lithium_version=
+    sodium_version=mc1.21-0.5.9
+    iris_version=1.7.1+1.21
+    bclib_version=
+    immersive_portals_version=
+    canvas_version=
+    
+    fabric_incompatibility_list={ "iris": "<=1.6.20" }
+    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=50.0.19
+neoforge_version=21.0.4-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