Fully move getShade into the clientLevelWrapper

# Conflicts:
#	core/src/main/java/com/seibel/distanthorizons/core/api/internal/ClientApi.java
#	core/src/main/java/com/seibel/distanthorizons/core/level/ClientLevelModule.java

api/src/main/java/com/seibel/distanthorizons/coreapi/ModInfo.java

@@ -31,7 +31,7 @@ public final class ModInfo
 	public static final String DEDICATED_SERVER_INITIAL_PATH = "dedicated_server_initial";
 	
 	/** Incremented every time any packets are added, changed or removed, with a few exceptions. */
-	public static final int PROTOCOL_VERSION = 13;
+	public static final int PROTOCOL_VERSION = 14;
 
 	/** 
 	 * The full plugin channel name (RESOURCE_NAMESPACE:WRAPPER_PACKET_PATH) 
@@ -43,7 +43,7 @@ public final class ModInfo
 	public static final String NAME = "DistantHorizons";
 	/** Human-readable version of NAME */
 	public static final String READABLE_NAME = "Distant Horizons";
-	public static final String VERSION = "3.0.3-b";
+	public static final String VERSION = "3.0.4-b-dev";
 	/** Returns true if the current build is an unstable developer build, false otherwise. */
 	public static final boolean IS_DEV_BUILD = VERSION.toLowerCase().contains("dev");
 	

core/src/main/java/com/seibel/distanthorizons/core/api/internal/ClientApi.java

@@ -41,6 +41,7 @@ import com.seibel.distanthorizons.core.util.objects.Pair;
 import com.seibel.distanthorizons.core.util.objects.RollingAverage;
 import com.seibel.distanthorizons.core.util.threading.ThreadPoolUtil;
 import com.seibel.distanthorizons.core.wrapperInterfaces.minecraft.IMinecraftRenderWrapper;
+import com.seibel.distanthorizons.core.wrapperInterfaces.modAccessor.IImmersivePortalsAccessor;
 import com.seibel.distanthorizons.core.wrapperInterfaces.modAccessor.IIrisAccessor;
 import com.seibel.distanthorizons.core.wrapperInterfaces.render.renderPass.IDhMetaRenderer;
 import com.seibel.distanthorizons.core.wrapperInterfaces.render.renderPass.IDhVanillaFadeRenderer;
@@ -53,7 +54,6 @@ import com.seibel.distanthorizons.coreapi.ModInfo;
 import com.seibel.distanthorizons.api.enums.rendering.EDhApiDebugRendering;
 import com.seibel.distanthorizons.api.enums.rendering.EDhApiRendererMode;
 import com.seibel.distanthorizons.core.dependencyInjection.SingletonInjector;
-import com.seibel.distanthorizons.core.level.IServerKeyedClientLevel;
 import com.seibel.distanthorizons.core.world.AbstractDhWorld;
 import com.seibel.distanthorizons.core.world.DhClientWorld;
 import com.seibel.distanthorizons.core.wrapperInterfaces.chunk.IChunkWrapper;
@@ -68,6 +68,7 @@ import org.lwjgl.glfw.GLFW;
 import java.awt.*;
 import java.io.File;
 import java.util.*;
+import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.LinkedBlockingQueue;
 import java.util.concurrent.RejectedExecutionException;
 import java.util.concurrent.ThreadPoolExecutor;
@@ -87,6 +88,11 @@ public class ClientApi
 	private static final IMinecraftClientWrapper MC_CLIENT = SingletonInjector.INSTANCE.get(IMinecraftClientWrapper.class);
 	private static final IMinecraftRenderWrapper MC_RENDER = SingletonInjector.INSTANCE.get(IMinecraftRenderWrapper.class);
 	
+	// Need to classload this field later because otherwise it will be null even when Immersive Portals is present.
+	public static class Late {
+		private static final IImmersivePortalsAccessor IMMERSIVE_PORTALS = ModAccessorInjector.INSTANCE.get(IImmersivePortalsAccessor.class);
+	}
+	
 	/** this includes the is dev build message and low allocated memory warning */
 	private static final int MS_BETWEEN_STATIC_STARTUP_MESSAGES = 4_000;
 	
@@ -119,7 +125,7 @@ public class ClientApi
 	
 	public boolean rendererDisabledBecauseOfExceptions = false;
 	
-	private final ClientPluginChannelApi pluginChannelApi = new ClientPluginChannelApi(this::clientLevelLoadEvent, this::clientLevelUnloadEvent);
+	private final ClientPluginChannelApi pluginChannelApi = new ClientPluginChannelApi();
 	
 	/** Delay loading the first level to give the server some time to respond with level to actually load */
 	private Timer firstLevelLoadTimer;
@@ -127,8 +133,8 @@ public class ClientApi
 	
 	/** Holds any levels that were loaded before the {@link ClientApi#onClientOnlyConnected} was fired. */
 	public final HashSet<IClientLevelWrapper> waitingClientLevels = new HashSet<>();
-	/** Holds any chunks that were loaded before the {@link ClientApi#clientLevelLoadEvent(IClientLevelWrapper)} was fired. */
+	/** Holds any chunks that were found before the client levels are loaded. */
-	public final HashMap<Pair<IClientLevelWrapper, DhChunkPos>, IChunkWrapper> waitingChunkByClientLevelAndPos = new HashMap<>();
+	public final Map<Pair<IClientLevelWrapper, DhChunkPos>, IChunkWrapper> waitingChunkByClientLevelAndPos = new ConcurrentHashMap<>();
 	
 	/** publicly available so {@link F3Screen} can display the error */
 	@Nullable
@@ -144,9 +150,13 @@ public class ClientApi
 	 * tracked should also be to keep the ratio roughly the same.
 	 * @see ClientApi#MIN_MS_BETWEEN_SPEED_CHECKS
 	 */
-	public RollingAverage cameraSpeedRollingAverage = new RollingAverage(40);
+	private RollingAverage cameraSpeedRollingAverage = new RollingAverage(40);
 	private Vec3d lastCameraPosForSpeedCheck = new Vec3d();
 	private long msSinceLastSpeedCheck = 0L;
+	public double getAvgCameraSpeed()
+	{
+		return cameraSpeedRollingAverage.getAverage();
+	}
 	
 	public static long firstRenderTimeMs = 0;
 	
@@ -176,7 +186,7 @@ public class ClientApi
 	
 	/**
 	 * May be fired slightly before or after the associated
-	 * {@link ClientApi#clientLevelLoadEvent(IClientLevelWrapper)} event
+	 * level is loaded
 	 * depending on how the host mod loader functions. <br><br>
 	 * 
 	 * Synchronized shouldn't be necessary, but is present to match {@see onClientOnlyDisconnected} and prevent any unforeseen issues. 
@@ -213,14 +223,6 @@ public class ClientApi
 			
 			this.pluginChannelApi.onJoinServer(world.networkState.getSession());
 			world.networkState.sendConfigMessage();
-			
-			LOGGER.info("Loading [" + this.waitingClientLevels.size() + "] waiting client level wrappers.");
-			for (IClientLevelWrapper level : this.waitingClientLevels)
-			{
-				this.clientLevelLoadEvent(level);
-			}
-			
-			this.waitingClientLevels.clear();
 		}
 	}
 	
@@ -247,7 +249,6 @@ public class ClientApi
 		
 		// remove any waiting items
 		this.waitingChunkByClientLevelAndPos.clear();
-		this.waitingClientLevels.clear();
 	}
 	
 	//endregion
@@ -259,44 +260,12 @@ public class ClientApi
 	//==============//
 	//region level events
 	
-	public void clientLevelUnloadEvent(IClientLevelWrapper level)
+	/** 
+	 * used in conjunction with the server networking to
+	 * handle level load requests. 
+	 */
+	public boolean canLoadClientLevel(IClientLevelWrapper wrapper) 
 	{
-		try
-		{
-			LOGGER.info("Unloading client level [" + level.getClass().getSimpleName() + "]-[" + level.getDhIdentifier() + "].");
-			
-			if (level instanceof IServerKeyedClientLevel)
-			{
-				this.pluginChannelApi.onClientLevelUnload();
-			}
-			
-			AbstractDhWorld world = SharedApi.getAbstractDhWorld();
-			if (world != null)
-			{
-				world.unloadLevel(level);
-				ApiEventInjector.INSTANCE.fireAllEvents(DhApiLevelUnloadEvent.class, new DhApiLevelUnloadEvent.EventParam(level));
-			}
-			else
-			{
-				this.waitingClientLevels.remove(level);
-			}
-		}
-		catch (Exception e)
-		{
-			// handle errors here to prevent blowing up a mixin or API up stream
-			LOGGER.error("Unexpected error in ClientApi.clientLevelUnloadEvent(), error: "+e.getMessage(), e);
-		}
-	}
-	
-	public void clientLevelLoadEvent(@Nullable IClientLevelWrapper levelWrapper)
-	{
-		// can happen if there was an issue during level load
-		if (levelWrapper == null)
-		{
-			return;
-		}
-		
-		
 		// wait a moment before loading the level to give the server a chance to handle the client's login request
 		if (MC_CLIENT.clientConnectedToDedicatedServer())
 		{
@@ -306,48 +275,41 @@ public class ClientApi
 				this.firstLevelLoadTimer.schedule(new TimerTask()
 				{
 					@Override
-					public void run() { ClientApi.this.clientLevelLoadEvent(levelWrapper); }
+					public void run() { canLoadClientLevel(wrapper); }
 				}, FIRST_LEVEL_LOAD_DELAY_IN_MS);
-				return;
+				return false;
 			}
+			
 			this.firstLevelLoadTimer.cancel();
 		}
 		
-		
+		if (!this.pluginChannelApi.allowLevelLoading(wrapper))
-		try
 		{
-			LOGGER.info("Loading client level [" + levelWrapper + "]-[" + levelWrapper.getDhIdentifier() + "].");
+			LOGGER.debug("Client levels in this connection are managed by the server, skipping auto-load of: ["+wrapper+"]");
-			
 			AbstractDhWorld world = SharedApi.getAbstractDhWorld();
-			if (world != null)
+			if (world == null)
 			{
-				if (!this.pluginChannelApi.allowLevelLoading(levelWrapper))
+				return false;
-				{
-					LOGGER.info("Levels in this connection are managed by the server, skipping auto-load.");
-					
-					// Instead of attempting to load themselves, send the config and wait for a server provided level key.
-					((DhClientWorld) world).networkState.sendConfigMessage();
-					return;
-				}
-				
-				
-				world.getOrLoadLevel(levelWrapper);
-				ApiEventInjector.INSTANCE.fireAllEvents(DhApiLevelLoadEvent.class, new DhApiLevelLoadEvent.EventParam(levelWrapper));
-				
-				this.loadWaitingChunksForLevel(levelWrapper);
-			}
-			else
-			{
-				this.waitingClientLevels.add(levelWrapper);
 			}
+			
+			// Instead of attempting to load themselves, send the config and wait for a server provided level key.
+			((DhClientWorld) world).networkState.sendLevelInitRequest(wrapper.getDimensionName());
+			return false;
 		}
-		catch (Exception e)
+		
-		{
+		return true;
-			// handle errors here to prevent blowing up a mixin or API up stream
-			LOGGER.error("Unexpected error in ClientApi.clientLevelLoadEvent(), error: "+e.getMessage(), e);
-		}
 	}
-	private void loadWaitingChunksForLevel(IClientLevelWrapper level)
+	
+	//endregion
+	
+	
+	
+	//==============//
+	// level events //
+	//==============//
+	//region
+	
+	public void loadWaitingChunksForLevel(IClientLevelWrapper level)
 	{
 		HashSet<Pair<IClientLevelWrapper, DhChunkPos>> keysToRemove = new HashSet<>();
 		for (Pair<IClientLevelWrapper, DhChunkPos> levelChunkPair : this.waitingChunkByClientLevelAndPos.keySet())
@@ -498,7 +460,7 @@ public class ClientApi
 					//region
 					
 					long nowMs = System.currentTimeMillis();
-					if (this.msSinceLastSpeedCheck + MIN_MS_BETWEEN_SPEED_CHECKS < nowMs)
+					if (this.msSinceLastSpeedCheck + MIN_MS_BETWEEN_SPEED_CHECKS < nowMs && (Late.IMMERSIVE_PORTALS == null || !Late.IMMERSIVE_PORTALS.isRenderingPortal()))
 					{
 						// calc time since last check
 						double secSinceLastCheck = (nowMs - this.msSinceLastSpeedCheck) / 1_000.0;
@@ -727,8 +689,7 @@ public class ClientApi
 				// or if LOD-only mode is enabled (fading is used to remove the MC render pass)
 				|| Config.Client.Advanced.Debugging.lodOnlyMode.get()
 			)
-			// don't fade when Iris shaders are active, otherwise the rendering can get weird
+			&& shouldRenderFade())
-			&& !DhApiRenderProxy.INSTANCE.getDeferTransparentRendering())
 		{
 			RenderParams renderParams = new RenderParams(EDhApiRenderPass.OPAQUE, RENDER_STATE);
 			fadeRenderer.render(renderParams);
@@ -757,8 +718,7 @@ public class ClientApi
 					// or if LOD-only mode is enabled (fading is used to remove the MC render pass)
 					|| Config.Client.Advanced.Debugging.lodOnlyMode.get()
 				)
-				// don't fade when Iris shaders are active, otherwise the rendering can get weird
+				&& shouldRenderFade();
-				&& !DhApiRenderProxy.INSTANCE.getDeferTransparentRendering();
 			if (renderFade)
 			{
 				RenderParams renderParams = new RenderParams(EDhApiRenderPass.TRANSPARENT, RENDER_STATE);
@@ -767,6 +727,25 @@ public class ClientApi
 		}
 	}
 	
+	private static boolean shouldRenderFade()
+	{
+		// don't fade when Iris shaders are active, otherwise the rendering can get weird
+		if (DhApiRenderProxy.INSTANCE.getDeferTransparentRendering())
+		{
+			return false;
+		}
+		
+		// When immersive portals and sodium are combined the fade renders on top of the portal, so turn it off when a portal is on-screen.
+		IImmersivePortalsAccessor immersivePortals = ModAccessorInjector.INSTANCE.get(IImmersivePortalsAccessor.class);
+		if (immersivePortals != null 
+			&& immersivePortals.wasPortalRecentlyVisible())
+		{
+			return false;
+		}
+		
+		return true;
+	}
+	
 	//endregion
 	
 	

core/src/main/java/com/seibel/distanthorizons/core/api/internal/ClientPluginChannelApi.java

@@ -10,6 +10,7 @@ import com.seibel.distanthorizons.core.network.event.internal.CloseInternalEvent
 import com.seibel.distanthorizons.core.network.messages.base.LevelInitMessage;
 import com.seibel.distanthorizons.core.network.session.NetworkSession;
 import com.seibel.distanthorizons.core.render.RenderThreadTaskHandler;
+import com.seibel.distanthorizons.core.world.AbstractDhWorld;
 import com.seibel.distanthorizons.core.wrapperInterfaces.minecraft.IMinecraftClientWrapper;
 import com.seibel.distanthorizons.core.wrapperInterfaces.world.IClientLevelWrapper;
 import org.jetbrains.annotations.NotNull;
@@ -30,9 +31,6 @@ public class ClientPluginChannelApi
 	private static final IMinecraftClientWrapper MC = SingletonInjector.INSTANCE.get(IMinecraftClientWrapper.class);
 	private static final IKeyedClientLevelManager KEYED_CLIENT_LEVEL_MANAGER = SingletonInjector.INSTANCE.get(IKeyedClientLevelManager.class);
 	
-	private final Consumer<IServerKeyedClientLevel> levelLoadHandler;
-	private final Consumer<IClientLevelWrapper> levelUnloadHandler;
-	
 	@Nullable
 	public NetworkSession networkSession;
 	
@@ -42,10 +40,8 @@ public class ClientPluginChannelApi
 	// constructor //
 	//=============//
 	
-	public ClientPluginChannelApi(Consumer<IServerKeyedClientLevel> levelLoadHandler, Consumer<IClientLevelWrapper> levelUnloadHandler)
+	public ClientPluginChannelApi()
 	{
-		this.levelLoadHandler = levelLoadHandler;
-		this.levelUnloadHandler = levelUnloadHandler;
 	}
 	
 	
@@ -94,24 +90,6 @@ public class ClientPluginChannelApi
 		{
 			IClientLevelWrapper clientLevel = MC.getWrappedClientLevel(true);
 			IServerKeyedClientLevel existingKeyedClientLevel = KEYED_CLIENT_LEVEL_MANAGER.getServerKeyedLevel();
-
-			if (existingKeyedClientLevel != null)
-			{
-				if (!existingKeyedClientLevel.getServerLevelKey().equals(msg.levelKey))
-				{
-					LOGGER.info("Unloading previous level with key: [" + existingKeyedClientLevel.getServerLevelKey() + "].");
-					this.levelUnloadHandler.accept(existingKeyedClientLevel);
-				}
-				else
-				{
-					LOGGER.info("Level key matches the previous level key, ignoring the message.");
-				}
-			}
-			else
-			{
-				LOGGER.info("Unloading non-keyed level: [" + clientLevel.getDhIdentifier() + "].");
-				this.levelUnloadHandler.accept(clientLevel);
-			}
 			
 			if (existingKeyedClientLevel == null
 					|| !existingKeyedClientLevel.getServerKey().equals(msg.serverKey)
@@ -119,7 +97,11 @@ public class ClientPluginChannelApi
 			{
 				LOGGER.info("Loading level with key: [" + msg.levelKey + "].");
 				IServerKeyedClientLevel keyedLevel = KEYED_CLIENT_LEVEL_MANAGER.setServerKeyedLevel(clientLevel, msg.serverKey, msg.levelKey);
-				this.levelLoadHandler.accept(keyedLevel);
+				AbstractDhWorld world = SharedApi.getAbstractDhWorld();
+				if (world != null)
+				{
+					world.getOrLoadLevel(keyedLevel);
+				}
 			}
 		});
 	}

core/src/main/java/com/seibel/distanthorizons/core/api/internal/ServerApi.java

@@ -19,13 +19,10 @@
 
 package com.seibel.distanthorizons.core.api.internal;
 
-import com.seibel.distanthorizons.api.methods.events.abstractEvents.DhApiLevelLoadEvent;
-import com.seibel.distanthorizons.api.methods.events.abstractEvents.DhApiLevelUnloadEvent;
 import com.seibel.distanthorizons.core.network.messages.AbstractNetworkMessage;
 import com.seibel.distanthorizons.core.network.messages.MessageRegistry;
 import com.seibel.distanthorizons.core.world.*;
 import com.seibel.distanthorizons.core.wrapperInterfaces.misc.IServerPlayerWrapper;
-import com.seibel.distanthorizons.coreapi.DependencyInjection.ApiEventInjector;
 import com.seibel.distanthorizons.core.logging.DhLoggerBuilder;
 import com.seibel.distanthorizons.core.wrapperInterfaces.chunk.IChunkWrapper;
 import com.seibel.distanthorizons.core.wrapperInterfaces.world.ILevelWrapper;
@@ -77,7 +74,6 @@ public class ServerApi
 	}
 	
 	
-	
 	//==============//
 	// level events //
 	//==============//
@@ -90,7 +86,6 @@ public class ServerApi
 		if (serverWorld != null)
 		{
 			serverWorld.getOrLoadLevel(levelWrapper);
-			ApiEventInjector.INSTANCE.fireAllEvents(DhApiLevelLoadEvent.class, new DhApiLevelLoadEvent.EventParam(levelWrapper));
 		}
 	}
 	public void serverLevelUnloadEvent(IServerLevelWrapper level)
@@ -101,12 +96,10 @@ public class ServerApi
 		if (serverWorld != null)
 		{
 			serverWorld.unloadLevel(level);
-			ApiEventInjector.INSTANCE.fireAllEvents(DhApiLevelUnloadEvent.class, new DhApiLevelUnloadEvent.EventParam(level));
 		}
 	}
 	
 	
-	
 	//=======================//
 	// chunk modified events //
 	//=======================//

core/src/main/java/com/seibel/distanthorizons/core/config/types/ConfigEntry.java

@@ -55,6 +55,16 @@ public class ConfigEntry<T> extends AbstractConfigBase<T>
 	@Nullable
 	private T apiValue;
 	
+	/** 
+	 * Will be null if un-set. <br> <br>
+	 * 
+	 * Some options aren't supported on all Minecraft versions,
+	 * in those cases this value will be set to override the 
+	 * config file option.
+	 */
+	@Nullable
+	private T mcVersionOverrideValue;
+	
 	
 	
 	//=============//
@@ -127,7 +137,14 @@ public class ConfigEntry<T> extends AbstractConfigBase<T>
 		return this.allowApiOverride 
 				&& this.apiValue != null; 
 	}
-		
+	
+	/** setting to null will allow the config to be used normally */
+	public void setMcVersionOverrideValue(@Nullable T value)
+	{ this.mcVersionOverrideValue = value; }
+	
+	public boolean mcVersionOverridePresent()
+	{ return this.mcVersionOverrideValue != null; }
+	
 	/** 
 	 * Should only be used when loading the config from file. <Br>
 	 * Sets the value without informing the rest of the code (ie, it doesn't call listeners, or saving the value to file).
@@ -183,6 +200,12 @@ public class ConfigEntry<T> extends AbstractConfigBase<T>
 	@Override
 	public T get()
 	{
+		// always use the MC version specific option if defined
+		if (this.mcVersionOverrideValue != null)
+		{
+			return this.mcVersionOverrideValue;
+		}
+		
 		if (this.allowApiOverride 
 			&& this.apiValue != null)
 		{

core/src/main/java/com/seibel/distanthorizons/core/dataObjects/render/bufferBuilding/ColumnBox.java

@@ -24,6 +24,7 @@ import com.seibel.distanthorizons.core.dependencyInjection.SingletonInjector;
 import com.seibel.distanthorizons.core.enums.EDhDirection;
 import com.seibel.distanthorizons.core.level.IDhClientLevel;
 import com.seibel.distanthorizons.core.util.objects.pooling.PhantomArrayListCheckout;
+import com.seibel.distanthorizons.core.wrapperInterfaces.world.IClientLevelWrapper;
 import com.seibel.distanthorizons.coreapi.util.ColorUtil;
 import com.seibel.distanthorizons.core.util.LodUtil;
 import com.seibel.distanthorizons.core.util.RenderDataPointUtil;
@@ -60,6 +61,12 @@ public class ColumnBox
 		// variable setup //
 		//================//
 		
+		IClientLevelWrapper clientLevelWrapper = clientLevel.getClientLevelWrapper();
+		if (clientLevelWrapper == null)
+		{
+			LodUtil.assertNotReach("addBoxQuadsToBuilder getClientLevelWrapper should always succeed");
+		}
+		
 		short maxX = (short) (minX + width);
 		short maxY = (short) (minY + yHeight);
 		short maxZ = (short) (minZ + width);
@@ -122,7 +129,7 @@ public class ColumnBox
 					&& !isTopTransparent;
 			if (!skipTop)
 			{
-				builder.addQuadUp(minX, maxY, minZ, width, ColorUtil.applyShade(color, MC_RENDER.getShade(EDhDirection.UP)), irisBlockMaterialId, skyLightTop, blockLight);
+				builder.addQuadUp(minX, maxY, minZ, width, ColorUtil.applyShade(color, clientLevelWrapper.getShade(EDhDirection.UP)), irisBlockMaterialId, skyLightTop, blockLight);
 			}
 		}
 		
@@ -133,7 +140,7 @@ public class ColumnBox
 					&& !isBottomTransparent;
 			if (!skipBottom)
 			{
-				builder.addQuadDown(minX, minY, minZ, width, ColorUtil.applyShade(color, MC_RENDER.getShade(EDhDirection.DOWN)), irisBlockMaterialId, skyLightBot, blockLight);
+				builder.addQuadDown(minX, minY, minZ, width, ColorUtil.applyShade(color, clientLevelWrapper.getShade(EDhDirection.DOWN)), irisBlockMaterialId, skyLightBot, blockLight);
 			}
 		}
 		
@@ -163,7 +170,7 @@ public class ColumnBox
 			else
 			{
 				makeAdjVerticalQuad(
-						builder, phantomArrayCheckout, 
+						builder, phantomArrayCheckout, clientLevelWrapper,
 						adjCol, adjSameDetailLevel, caveCullingMaxY, EDhDirection.NORTH, 
 						minX, minY, minZ, width, yHeight,
 						color, irisBlockMaterialId, blockLight);
@@ -188,7 +195,7 @@ public class ColumnBox
 			else
 			{
 				makeAdjVerticalQuad(
-						builder, phantomArrayCheckout,
+						builder, phantomArrayCheckout, clientLevelWrapper,
 						adjCol, adjSameDetailLevel, caveCullingMaxY, EDhDirection.SOUTH,
 						minX, minY, maxZ, width, yHeight,
 						color, irisBlockMaterialId, blockLight);
@@ -213,7 +220,7 @@ public class ColumnBox
 			else
 			{
 				makeAdjVerticalQuad(
-						builder, phantomArrayCheckout,
+						builder, phantomArrayCheckout, clientLevelWrapper,
 						adjCol, adjSameDetailLevel, caveCullingMaxY, EDhDirection.WEST, 
 						minX, minY, minZ, width, yHeight,
 						color, irisBlockMaterialId, blockLight);
@@ -238,7 +245,7 @@ public class ColumnBox
 			else
 			{
 				makeAdjVerticalQuad(
-						builder, phantomArrayCheckout,
+						builder, phantomArrayCheckout, clientLevelWrapper,
 						adjCol, adjSameDetailLevel, caveCullingMaxY, EDhDirection.EAST, 
 						maxX, minY, minZ, width, yHeight,
 						color, irisBlockMaterialId, blockLight);
@@ -247,7 +254,7 @@ public class ColumnBox
 	}
 	
 	private static void makeAdjVerticalQuad(
-		LodQuadBuilder builder, PhantomArrayListCheckout phantomArrayCheckout,
+		LodQuadBuilder builder, PhantomArrayListCheckout phantomArrayCheckout, IClientLevelWrapper clientLevelWrapper,
 		@NotNull ColumnRenderView adjColumnView, boolean adjacentIsSameDetailLevel, int caveCullingMaxY, EDhDirection direction,
 		short x, short yMin, short z, short horizontalWidth, short ySize,
 		int color, byte irisBlockMaterialId, byte blockLight)
@@ -263,7 +270,7 @@ public class ColumnBox
 		// no adjacent data //
 		//==================//
 		
-		color = ColorUtil.applyShade(color, MC_RENDER.getShade(direction));
+		color = ColorUtil.applyShade(color, clientLevelWrapper.getShade(direction));
 		
 		if (adjColumnView.size == 0
 			|| RenderDataPointUtil.hasZeroHeight(adjColumnView.get(0)))

core/src/main/java/com/seibel/distanthorizons/core/dataObjects/render/bufferBuilding/LodQuadBuilder.java

@@ -394,7 +394,7 @@ public class LodQuadBuilder
 								// for horizontal and bottom faces of grass blocks, use the  dirt color to
 								// prevent green cliff walls
 								color = this.clientLevelWrapper.getDirtBlockColor();
-								color = ColorUtil.applyShade(color, MC_RENDER.getShade(quad.direction));
+								color = ColorUtil.applyShade(color, this.clientLevelWrapper.getShade(quad.direction));
 							}
 						}
 					}

core/src/main/java/com/seibel/distanthorizons/core/generation/queues/LodRequestModule.java

@@ -123,17 +123,6 @@ public class LodRequestModule implements Closeable
 		// if the world is read only don't generate anything
 		shouldDoWorldGen &= !DhApiWorldProxy.INSTANCE.tryGetReadOnly();
 		
-		// don't generate chunks for client levels that aren't being rendered
-		// (this can happen when moving between dimensions)
-		if (this.level instanceof IDhClientLevel)
-		{
-			boolean isRendering = ((IDhClientLevel) this.level).isRendering();
-			if (!isRendering)
-			{
-				shouldDoWorldGen = false;
-			}
-		}
-		
 		
 		
 		boolean isWorldGenRunning = this.isWorldGenRunning();

core/src/main/java/com/seibel/distanthorizons/core/level/AbstractDhServerLevel.java

@@ -9,7 +9,6 @@ import com.seibel.distanthorizons.core.multiplayer.server.FullDataSourceRequestH
 import com.seibel.distanthorizons.core.multiplayer.server.ServerPlayerState;
 import com.seibel.distanthorizons.core.multiplayer.server.ServerPlayerStateManager;
 import com.seibel.distanthorizons.core.network.exceptions.RequestOutOfRangeException;
-import com.seibel.distanthorizons.core.network.exceptions.RequestRejectedException;
 import com.seibel.distanthorizons.core.network.exceptions.SectionRequiresSplittingException;
 import com.seibel.distanthorizons.core.network.messages.AbstractNetworkMessage;
 import com.seibel.distanthorizons.core.network.messages.AbstractTrackableMessage;
@@ -200,26 +199,6 @@ public abstract class AbstractDhServerLevel extends AbstractDhLevel implements I
 		
 		LodUtil.assertTrue(message.getSession().serverPlayer != null);
 		
-		// Check if the player is in this dimension,
-		// since handling multiple dimensions isn't allowed
-		if (message.getSession().serverPlayer.getLevel() != this.getLevelWrapper())
-		{
-			// If the message can be replied to - reply with an error, otherwise just ignore
-			if (message instanceof AbstractTrackableMessage)
-			{
-				((AbstractTrackableMessage) message).sendResponse(
-						new RequestRejectedException(
-								"Generation not allowed. " +
-										"Requested dimension: ["+((ILevelRelatedMessage) message).getLevelName()+"], " +
-										"player dimension: [" + message.getSession().serverPlayer.getLevel().getDhIdentifier() + "], " +
-										"handler dimension: [" + this.getLevelWrapper().getDhIdentifier() + "]"
-						)
-				);
-			}
-			
-			return false;
-		}
-		
 		return true;
 	}
 	

core/src/main/java/com/seibel/distanthorizons/core/level/ClientLevelModule.java

@@ -21,10 +21,12 @@ package com.seibel.distanthorizons.core.level;
 
 import com.seibel.distanthorizons.core.config.Config;
 import com.seibel.distanthorizons.core.dataObjects.fullData.sources.FullDataSourceV2;
+import com.seibel.distanthorizons.core.dependencyInjection.ModAccessorInjector;
 import com.seibel.distanthorizons.core.dependencyInjection.SingletonInjector;
 import com.seibel.distanthorizons.core.file.fullDatafile.IDataSourceUpdateListenerFunc;
 import com.seibel.distanthorizons.core.file.fullDatafile.V2.FullDataSourceProviderV2;
 import com.seibel.distanthorizons.core.logging.DhLoggerBuilder;
+import com.seibel.distanthorizons.core.pos.blockPos.DhBlockPos;
 import com.seibel.distanthorizons.core.pos.blockPos.DhBlockPos2D;
 import com.seibel.distanthorizons.core.render.QuadTree.LodQuadTree;
 import com.seibel.distanthorizons.core.render.RenderBufferHandler;
@@ -33,6 +35,7 @@ import com.seibel.distanthorizons.core.util.math.Vec3d;
 import com.seibel.distanthorizons.core.wrapperInterfaces.IWrapperFactory;
 import com.seibel.distanthorizons.core.wrapperInterfaces.minecraft.IMinecraftClientWrapper;
 import com.seibel.distanthorizons.core.wrapperInterfaces.minecraft.IMinecraftRenderWrapper;
+import com.seibel.distanthorizons.core.wrapperInterfaces.modAccessor.IImmersivePortalsAccessor;
 import com.seibel.distanthorizons.core.wrapperInterfaces.render.renderPass.IDhGenericRenderer;
 import com.seibel.distanthorizons.core.wrapperInterfaces.world.IClientLevelWrapper;
 import com.seibel.distanthorizons.core.logging.DhLogger;

core/src/main/java/com/seibel/distanthorizons/core/level/DhClientLevel.java

@@ -167,15 +167,17 @@ public class DhClientLevel extends AbstractDhLevel implements IDhClientLevel
 			}
 			
 			
+			// Check this before decoding data to prevent errors if multiple client levels 
+			// are receiving data at once (Immersive Portals compatibility).
+			boolean isSameLevel = message.isSameLevelAs(this.levelWrapper);
+			//NETWORK_LOGGER.debug("Buffer ["+message.payload.dtoBufferId+"] isSameLevel: ["+isSameLevel+"]");
+			if (!isSameLevel)
+			{
+				return;
+			}
+			
 			try (FullDataSourceV2DTO dataSourceDto = this.networkState.fullDataPayloadReceiver.decodeDataSource(message.payload))
 			{
-				boolean isSameLevel = message.isSameLevelAs(this.levelWrapper);
-				NETWORK_LOGGER.debug("Buffer ["+message.payload.dtoBufferId+"] isSameLevel: ["+isSameLevel+"]");
-				if (!isSameLevel)
-				{
-					return;
-				}
-				
 				
 				Executor executor = ThreadPoolUtil.getFileHandlerExecutor();
 				if (executor != null)
@@ -219,6 +221,7 @@ public class DhClientLevel extends AbstractDhLevel implements IDhClientLevel
 	{
 		try
 		{
+			if (MC_CLIENT.getWrappedClientLevel() == null || MC_CLIENT.getWrappedClientLevel().getDhLevel() != this) return;
 			this.clientside.clientTick();
 			
 			if (this.syncOnLoadRequestQueue != null)

core/src/main/java/com/seibel/distanthorizons/core/level/DhClientServerLevel.java

@@ -71,7 +71,11 @@ public class DhClientServerLevel extends AbstractDhServerLevel implements IDhCli
 	//region
 	
 	@Override
-	public void clientTick() { this.clientside.clientTick(); }
+	public void clientTick()
+	{
+		if (MC_CLIENT.getWrappedClientLevel() == null || MC_CLIENT.getWrappedClientLevel().getDhLevel() != this) return;
+		this.clientside.clientTick();
+	}
 	
 	//endregion
 	

core/src/main/java/com/seibel/distanthorizons/core/multiplayer/client/ClientNetworkState.java

@@ -13,6 +13,7 @@ import com.seibel.distanthorizons.core.network.event.ScopedNetworkEventSource;
 import com.seibel.distanthorizons.core.network.event.internal.CloseInternalEvent;
 import com.seibel.distanthorizons.core.network.event.internal.IncompatibleMessageInternalEvent;
 import com.seibel.distanthorizons.core.network.messages.base.LevelInitMessage;
+import com.seibel.distanthorizons.core.network.messages.base.RequestLevelInitMessage;
 import com.seibel.distanthorizons.core.network.messages.base.SessionConfigMessage;
 import com.seibel.distanthorizons.core.network.messages.fullData.FullDataSourceResponseMessage;
 import com.seibel.distanthorizons.core.network.messages.fullData.FullDataSplitMessage;
@@ -164,7 +165,8 @@ public class ClientNetworkState implements Closeable
 	// send message //
 	//==============//
 	
-	
+	public void sendLevelInitRequest(String clientLevelKey) 
+	{ this.getSession().sendMessage(new RequestLevelInitMessage(clientLevelKey)); }
 	
 	public void sendConfigMessage() { this.sendConfigMessage(true); }
 	public void sendConfigMessage(boolean blocking)

core/src/main/java/com/seibel/distanthorizons/core/multiplayer/server/ServerPlayerState.java

@@ -2,6 +2,7 @@ package com.seibel.distanthorizons.core.multiplayer.server;
 
 import com.seibel.distanthorizons.core.config.Config;
 import com.seibel.distanthorizons.core.config.listeners.ConfigChangeListener;
+import com.seibel.distanthorizons.core.dependencyInjection.SingletonInjector;
 import com.seibel.distanthorizons.core.level.AbstractDhServerLevel;
 import com.seibel.distanthorizons.core.multiplayer.config.SessionConfig;
 import com.seibel.distanthorizons.core.multiplayer.fullData.FullDataPayloadSender;
@@ -9,20 +10,25 @@ import com.seibel.distanthorizons.core.multiplayer.fullData.SharedBandwidthLimit
 import com.seibel.distanthorizons.core.network.event.internal.IncompatibleMessageInternalEvent;
 import com.seibel.distanthorizons.core.network.messages.base.CloseReasonMessage;
 import com.seibel.distanthorizons.core.network.messages.base.LevelInitMessage;
+import com.seibel.distanthorizons.core.network.messages.base.RequestLevelInitMessage;
 import com.seibel.distanthorizons.core.network.messages.base.SessionConfigMessage;
 import com.seibel.distanthorizons.core.network.event.internal.CloseInternalEvent;
 import com.seibel.distanthorizons.core.network.exceptions.RateLimitedException;
 import com.seibel.distanthorizons.core.network.messages.fullData.FullDataSourceRequestMessage;
 import com.seibel.distanthorizons.core.network.session.NetworkSession;
 import com.seibel.distanthorizons.core.util.ratelimiting.SupplierBasedRateAndConcurrencyLimiter;
+import com.seibel.distanthorizons.core.wrapperInterfaces.minecraft.IMinecraftSharedWrapper;
 import com.seibel.distanthorizons.core.wrapperInterfaces.misc.IServerPlayerWrapper;
 import org.jetbrains.annotations.NotNull;
 
 import java.io.Closeable;
 import java.util.concurrent.ConcurrentHashMap;
+import java.util.function.Supplier;
 
 public class ServerPlayerState implements Closeable
 {
+	private final IMinecraftSharedWrapper MC_SHARED = SingletonInjector.INSTANCE.get(IMinecraftSharedWrapper.class);
+	
 	private final ConfigChangeListener<String> levelKeyPrefixChangeListener
 			= new ConfigChangeListener<>(Config.Server.levelKeyPrefix, this::onLevelKeyPrefixConfigChanged);
 	private final SessionConfig.AnyChangeListener configAnyChangeListener = new SessionConfig.AnyChangeListener(this::sendConfigMessage);
@@ -66,6 +72,12 @@ public class ServerPlayerState implements Closeable
 			this.sendConfigMessage();
 		});
 		
+		this.networkSession.registerHandler(RequestLevelInitMessage.class, (requestLevelKeyMessage) ->
+		{
+			sendLevelKey(requestLevelKeyMessage.clientLevelKey);
+		});
+		
+		
 		this.networkSession.registerHandler(CloseInternalEvent.class, event -> {
 			// No-op. prevents "Unhandled message" log entries
 		});
@@ -85,12 +97,27 @@ public class ServerPlayerState implements Closeable
 	//=================//
 	
 	private void onLevelKeyPrefixConfigChanged(String newLevelKey) { this.sendLevelKey(); }
+	
+	private void sendLevelKey(String clientLevelKey)
+	{
+		sendLevelKey(() -> 
+			MC_SHARED
+			.getWrappedServerLevel(clientLevelKey)
+			.getKeyedLevelDimensionName());
+	}
 	private void sendLevelKey()
+	{
+		sendLevelKey(() -> 
+			this.getServerPlayer()
+				.getLevel()
+				.getKeyedLevelDimensionName());
+	}
+	private void sendLevelKey(Supplier<String> levelKeySupplier)
 	{
 		if (Config.Server.sendLevelKeys.get())
 		{
+			String levelKey = levelKeySupplier.get();
 			// let the client's know about the change
-			String levelKey = this.getServerPlayer().getLevel().getKeyedLevelDimensionName();
 			if (!levelKey.equals(this.lastLevelKey))
 			{
 				this.lastLevelKey = levelKey;

core/src/main/java/com/seibel/distanthorizons/core/network/messages/MessageRegistry.java

@@ -21,12 +21,9 @@ package com.seibel.distanthorizons.core.network.messages;
 
 import com.google.common.collect.BiMap;
 import com.google.common.collect.HashBiMap;
-import com.seibel.distanthorizons.core.network.messages.base.CodecCrashMessage;
+import com.seibel.distanthorizons.core.network.messages.base.*;
-import com.seibel.distanthorizons.core.network.messages.base.LevelInitMessage;
-import com.seibel.distanthorizons.core.network.messages.base.SessionConfigMessage;
 import com.seibel.distanthorizons.core.network.messages.fullData.FullDataSplitMessage;
 import com.seibel.distanthorizons.core.network.messages.requests.CancelMessage;
-import com.seibel.distanthorizons.core.network.messages.base.CloseReasonMessage;
 import com.seibel.distanthorizons.core.network.messages.requests.ExceptionMessage;
 import com.seibel.distanthorizons.core.network.messages.fullData.FullDataPartialUpdateMessage;
 import com.seibel.distanthorizons.core.network.messages.fullData.FullDataSourceRequestMessage;
@@ -60,6 +57,7 @@ public class MessageRegistry
 		
 		// Level keys
 		this.registerMessage(LevelInitMessage.class, LevelInitMessage::new);
+		this.registerMessage(RequestLevelInitMessage.class, RequestLevelInitMessage::new);
 		
 		// Config (for full DH support)
 		this.registerMessage(SessionConfigMessage.class, SessionConfigMessage::new);

core/src/main/java/com/seibel/distanthorizons/core/network/messages/base/RequestLevelInitMessage.java

@@ -0,0 +1,65 @@
+/*
+ *    This file is part of the Distant Horizons mod
+ *    licensed under the GNU LGPL v3 License.
+ *
+ *    Copyright (C) 2020 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.core.network.messages.base;
+
+import com.google.common.base.MoreObjects;
+import com.seibel.distanthorizons.core.network.messages.AbstractNetworkMessage;
+import io.netty.buffer.ByteBuf;
+
+/** used for full DH support */
+public class RequestLevelInitMessage extends AbstractNetworkMessage
+{
+	public String clientLevelKey;
+	
+	
+	
+	//=============//
+	// constructor //
+	//=============//
+	
+	public RequestLevelInitMessage() { }
+	public RequestLevelInitMessage(String clientLevelKey) { this.clientLevelKey = clientLevelKey; }
+	
+	
+	
+	//===============//
+	// serialization //
+	//===============//
+	
+	@Override
+	public void encode(ByteBuf out) { this.writeString(this.clientLevelKey, out); }
+	
+	@Override
+	public void decode(ByteBuf in) { this.clientLevelKey = this.readString(in); }
+	
+	
+	
+	//================//
+	// base overrides //
+	//================//
+	
+	@Override
+	public MoreObjects.ToStringHelper toStringHelper()
+	{
+		return super.toStringHelper()
+				.add("levelKey", this.clientLevelKey);
+	}
+	
+}

core/src/main/java/com/seibel/distanthorizons/core/render/DhApiRenderProxy.java

@@ -77,6 +77,8 @@ public class DhApiRenderProxy implements IDhApiRenderProxy
 			}
 		}
 		
+		// TODO clear tint handler too
+		
 		return DhApiResult.createSuccess();
 	}
 	

core/src/main/java/com/seibel/distanthorizons/core/render/RenderParams.java

@@ -6,18 +6,14 @@ import com.seibel.distanthorizons.core.api.internal.SharedApi;
 import com.seibel.distanthorizons.core.api.internal.rendering.DhRenderState;
 import com.seibel.distanthorizons.core.dependencyInjection.ModAccessorInjector;
 import com.seibel.distanthorizons.core.dependencyInjection.SingletonInjector;
-import com.seibel.distanthorizons.core.jar.EPlatform;
 import com.seibel.distanthorizons.core.level.IDhClientLevel;
 import com.seibel.distanthorizons.core.util.RenderUtil;
 import com.seibel.distanthorizons.core.util.math.Mat4f;
 import com.seibel.distanthorizons.core.util.math.Vec3d;
-import com.seibel.distanthorizons.core.util.threading.PriorityTaskPicker;
-import com.seibel.distanthorizons.core.util.threading.ThreadPoolUtil;
 import com.seibel.distanthorizons.core.world.IDhClientWorld;
 import com.seibel.distanthorizons.core.wrapperInterfaces.minecraft.IMinecraftClientWrapper;
 import com.seibel.distanthorizons.core.wrapperInterfaces.minecraft.IMinecraftRenderWrapper;
 import com.seibel.distanthorizons.core.wrapperInterfaces.misc.ILightMapWrapper;
-import com.seibel.distanthorizons.core.wrapperInterfaces.modAccessor.AbstractOptifineAccessor;
 import com.seibel.distanthorizons.core.wrapperInterfaces.modAccessor.IOptifineAccessor;
 import com.seibel.distanthorizons.core.wrapperInterfaces.render.renderPass.IDhGenericRenderer;
 import com.seibel.distanthorizons.core.wrapperInterfaces.world.IClientLevelWrapper;
@@ -87,7 +83,7 @@ public class RenderParams extends DhApiRenderParam
 		this.dhClientWorld = SharedApi.tryGetDhClientWorld();
 		if (this.dhClientWorld != null)
 		{
-			this.dhClientLevel = (IDhClientLevel) this.dhClientWorld.getLevel(clientLevelWrapper);
+			this.dhClientLevel = this.dhClientWorld.getOrLoadClientLevel(clientLevelWrapper);
 			if (this.dhClientLevel != null)
 			{
 				this.renderBufferHandler = this.dhClientLevel.getRenderBufferHandler();

core/src/main/java/com/seibel/distanthorizons/core/util/RenderUtil.java

@@ -163,7 +163,7 @@ public class RenderUtil
 		
 		if (Config.Client.Advanced.Graphics.Culling.reduceOverdrawWithFastMovement.get())
 		{
-			double avgSpeed = ClientApi.INSTANCE.cameraSpeedRollingAverage.getAverage();
+			double avgSpeed = ClientApi.INSTANCE.getAvgCameraSpeed();
 			if (avgSpeed >= DynamicOverdraw.MIN_SPEED)
 			{
 				// if the player is moving fast enough,

core/src/main/java/com/seibel/distanthorizons/core/util/threading/ThreadPoolUtil.java

@@ -170,7 +170,7 @@ public class ThreadPoolUtil
 	 */
 	public static boolean worldGenThreadsCanRun()
 	{
-		double cameraSpeed = ClientApi.INSTANCE.cameraSpeedRollingAverage.getAverage();
+		double cameraSpeed = ClientApi.INSTANCE.getAvgCameraSpeed();
 		// stop these threads if moving a little bit slower than max elytra speed
 		double maxAllowedSpeed = (LodUtil.ROCKET_ELYTRA_SPEED_IN_BLOCKS_PER_SEC - 10.0);
 		if (cameraSpeed > maxAllowedSpeed)

core/src/main/java/com/seibel/distanthorizons/core/world/AbstractDhServerWorld.java

@@ -1,5 +1,6 @@
 package com.seibel.distanthorizons.core.world;
 
+import com.seibel.distanthorizons.api.methods.events.abstractEvents.DhApiLevelUnloadEvent;
 import com.seibel.distanthorizons.core.file.structure.LocalSaveStructure;
 import com.seibel.distanthorizons.core.level.AbstractDhServerLevel;
 import com.seibel.distanthorizons.core.level.IDhLevel;
@@ -8,6 +9,7 @@ import com.seibel.distanthorizons.core.multiplayer.server.ServerPlayerStateManag
 import com.seibel.distanthorizons.core.wrapperInterfaces.misc.IServerPlayerWrapper;
 import com.seibel.distanthorizons.core.wrapperInterfaces.world.ILevelWrapper;
 import com.seibel.distanthorizons.core.wrapperInterfaces.world.IServerLevelWrapper;
+import com.seibel.distanthorizons.coreapi.DependencyInjection.ApiEventInjector;
 import org.jetbrains.annotations.NotNull;
 
 import java.util.ArrayList;
@@ -138,6 +140,7 @@ public abstract class AbstractDhServerWorld<TDhServerLevel extends AbstractDhSer
 			if (serverLevelWrapper != null)
 			{
 				serverLevelWrapper.onUnload();
+				ApiEventInjector.INSTANCE.fireAllEvents(DhApiLevelUnloadEvent.class, new DhApiLevelUnloadEvent.EventParam(serverLevelWrapper));
 			}
 			
 			

core/src/main/java/com/seibel/distanthorizons/core/world/DhClientServerWorld.java

@@ -19,6 +19,8 @@
 
 package com.seibel.distanthorizons.core.world;
 
+import com.seibel.distanthorizons.api.methods.events.abstractEvents.DhApiLevelLoadEvent;
+import com.seibel.distanthorizons.api.methods.events.abstractEvents.DhApiLevelUnloadEvent;
 import com.seibel.distanthorizons.core.api.internal.ClientApi;
 import com.seibel.distanthorizons.core.enums.MinecraftTextFormat;
 import com.seibel.distanthorizons.core.level.DhClientServerLevel;
@@ -27,6 +29,7 @@ import com.seibel.distanthorizons.core.util.LodUtil;
 import com.seibel.distanthorizons.core.wrapperInterfaces.world.IClientLevelWrapper;
 import com.seibel.distanthorizons.core.wrapperInterfaces.world.ILevelWrapper;
 import com.seibel.distanthorizons.core.wrapperInterfaces.world.IServerLevelWrapper;
+import com.seibel.distanthorizons.coreapi.DependencyInjection.ApiEventInjector;
 import org.jetbrains.annotations.NotNull;
 
 import java.util.*;
@@ -34,7 +37,7 @@ import java.util.concurrent.CompletableFuture;
 
 public class DhClientServerWorld extends AbstractDhServerWorld<DhClientServerLevel> implements IDhClientWorld
 {
-	private final Set<DhClientServerLevel> dhLevels = Collections.synchronizedSet(new HashSet<>());
+	private final Map<DhClientServerLevel, Set<ILevelWrapper>> dhLevels = Collections.synchronizedMap(new HashMap<>());
 	
 	private final Timer clientTickTimer = TimerUtil.CreateTimer("ClientTickTimer");
 	
@@ -54,7 +57,7 @@ public class DhClientServerWorld extends AbstractDhServerWorld<DhClientServerLev
 			@Override 
 			public void run()
 			{
-				DhClientServerWorld.this.dhLevels.forEach(DhClientServerLevel::clientTick);
+				DhClientServerWorld.this.dhLevels.keySet().forEach(DhClientServerLevel::clientTick);
 			}
 		}, 0, IDhClientWorld.TICK_RATE_IN_MS);
 	}
@@ -75,7 +78,8 @@ public class DhClientServerWorld extends AbstractDhServerWorld<DhClientServerLev
 				try
 				{
 					DhClientServerLevel level = new DhClientServerLevel(this.saveStructure, (IServerLevelWrapper) levelWrapper, this.getServerPlayerStateManager());
-					this.dhLevels.add(level);
+					this.dhLevels.computeIfAbsent(level, k -> Collections.synchronizedSet(new HashSet<>()));
+					ApiEventInjector.INSTANCE.fireAllEvents(DhApiLevelLoadEvent.class, new DhApiLevelLoadEvent.EventParam(wrapper));
 					return level;
 				}
 				catch (Exception e)
@@ -92,6 +96,10 @@ public class DhClientServerWorld extends AbstractDhServerWorld<DhClientServerLev
 		}
 		else
 		{
+			if (wrapper instanceof IClientLevelWrapper)
+			{
+				((IClientLevelWrapper) wrapper).markAccessed();
+			}
 			return this.dhLevelByLevelWrapper.computeIfAbsent(wrapper, (levelWrapper) ->
 			{
 				IClientLevelWrapper clientLevelWrapper = (IClientLevelWrapper) levelWrapper;
@@ -111,13 +119,14 @@ public class DhClientServerWorld extends AbstractDhServerWorld<DhClientServerLev
 				
 				level.startRenderer();
 				clientLevelWrapper.setDhLevel(level);
+				dhLevels.get(level).add(wrapper);
 				return level;
 			});
 		}
 	}
 	
 	@Override
-	public void unloadLevel(@NotNull ILevelWrapper wrapper)
+	public boolean unloadLevel(@NotNull ILevelWrapper wrapper)
 	{
 		if (this.dhLevelByLevelWrapper.containsKey(wrapper))
 		{
@@ -135,9 +144,18 @@ public class DhClientServerWorld extends AbstractDhServerWorld<DhClientServerLev
 				// If the level wrapper is a Client Level Wrapper, then that means the client side leaves the level,
 				// but note that the server side still has the level loaded. So, we don't want to unload the level,
 				// we just want to stop rendering it.
-				this.dhLevelByLevelWrapper.remove(wrapper).stopRenderer(); // Ignore resource warning. The level obj is referenced elsewhere.
+				DhClientServerLevel level = this.dhLevelByLevelWrapper.remove(wrapper); // Ignore resource warning. The level obj is referenced elsewhere.
+				Set<ILevelWrapper> wrappers = dhLevels.get(level);
+				if (wrappers != null) wrappers.remove(wrapper);
+				if ((wrappers == null || wrappers.isEmpty()) && level.isRendering()) {
+					level.stopRenderer();
+				}
+				wrapper.onUnload(); // We still want to unload the wrapper though.
 			}
+			ApiEventInjector.INSTANCE.fireAllEvents(DhApiLevelUnloadEvent.class, new DhApiLevelUnloadEvent.EventParam(wrapper));
+			return true;
 		}
+		return false;
 	}
 	
 	
@@ -155,13 +173,21 @@ public class DhClientServerWorld extends AbstractDhServerWorld<DhClientServerLev
 		synchronized (this.dhLevels)
 		{
 			// close each level
-			for (DhClientServerLevel level : this.dhLevels)
+			for (DhClientServerLevel level : this.dhLevels.keySet())
 			{
 				// level wrapper shouldn't be null, but just in case
 				IServerLevelWrapper serverLevelWrapper = level.getServerLevelWrapper();
 				if (serverLevelWrapper != null)
 				{
 					serverLevelWrapper.onUnload();
+					ApiEventInjector.INSTANCE.fireAllEvents(DhApiLevelUnloadEvent.class, new DhApiLevelUnloadEvent.EventParam(serverLevelWrapper));
+				}
+				
+				IClientLevelWrapper clientLevelWrapper = level.getClientLevelWrapper();
+				if (clientLevelWrapper != null)
+				{
+					clientLevelWrapper.onUnload();
+					ApiEventInjector.INSTANCE.fireAllEvents(DhApiLevelUnloadEvent.class, new DhApiLevelUnloadEvent.EventParam(clientLevelWrapper));
 				}
 				
 				// close levels asynchronously to speed up

core/src/main/java/com/seibel/distanthorizons/core/world/DhClientWorld.java

@@ -19,6 +19,8 @@
 
 package com.seibel.distanthorizons.core.world;
 
+import com.seibel.distanthorizons.api.methods.events.abstractEvents.DhApiLevelLoadEvent;
+import com.seibel.distanthorizons.api.methods.events.abstractEvents.DhApiLevelUnloadEvent;
 import com.seibel.distanthorizons.core.api.internal.ClientApi;
 import com.seibel.distanthorizons.core.enums.MinecraftTextFormat;
 import com.seibel.distanthorizons.core.file.structure.ClientOnlySaveStructure;
@@ -28,18 +30,17 @@ import com.seibel.distanthorizons.core.multiplayer.client.ClientNetworkState;
 import com.seibel.distanthorizons.core.util.TimerUtil;
 import com.seibel.distanthorizons.core.wrapperInterfaces.world.IClientLevelWrapper;
 import com.seibel.distanthorizons.core.wrapperInterfaces.world.ILevelWrapper;
+import com.seibel.distanthorizons.coreapi.DependencyInjection.ApiEventInjector;
 import org.jetbrains.annotations.NotNull;
 
-import java.util.ArrayList;
+import java.util.*;
-import java.util.List;
-import java.util.Timer;
-import java.util.TimerTask;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.ConcurrentHashMap;
 
 public class DhClientWorld extends AbstractDhWorld implements IDhClientWorld
 {
-	private final ConcurrentHashMap<IClientLevelWrapper, DhClientLevel> levels;
+	private final ConcurrentHashMap<String, DhClientLevel> levels;
+	private final Map<String, Set<IClientLevelWrapper>> levelWrappers = new ConcurrentHashMap<>();
 	public final ClientOnlySaveStructure saveStructure;
 	public final ClientNetworkState networkState = new ClientNetworkState();
 	
@@ -76,6 +77,32 @@ public class DhClientWorld extends AbstractDhWorld implements IDhClientWorld
 	// methods //
 	//=========//
 	
+	private DhClientLevel createClientLevel(@NotNull IClientLevelWrapper clientLevelWrapper) {
+		try
+		{
+			if (!ClientApi.INSTANCE.canLoadClientLevel(clientLevelWrapper))
+			{
+				return null;
+			}
+			
+			DhClientLevel level = new DhClientLevel(this.saveStructure, clientLevelWrapper, this.networkState);
+			levelWrappers.computeIfAbsent(clientLevelWrapper.getDhIdentifier(), k -> Collections.synchronizedSet(new HashSet<>())).add(clientLevelWrapper);
+			ApiEventInjector.INSTANCE.fireAllEvents(DhApiLevelLoadEvent.class, new DhApiLevelLoadEvent.EventParam(clientLevelWrapper));
+			ClientApi.INSTANCE.loadWaitingChunksForLevel(clientLevelWrapper);
+			return level;
+		}
+		catch (Exception e)
+		{
+			LOGGER.fatal("Failed to load client level, error: ["+e.getMessage()+"].", e);
+			
+			ClientApi.INSTANCE.showChatMessageNextFrame(
+				MinecraftTextFormat.RED + "Distant Horizons: Client level loading failed." + MinecraftTextFormat.CLEAR_FORMATTING + "\n" +
+					"Unable to load level ["+clientLevelWrapper.getDhIdentifier()+"], LODs may not appear. See log for more information.");
+			
+			return null;
+		}
+	}
+	
 	@Override
 	public DhClientLevel getOrLoadLevel(@NotNull ILevelWrapper wrapper)
 	{
@@ -83,25 +110,20 @@ public class DhClientWorld extends AbstractDhWorld implements IDhClientWorld
 		{
 			return null;
 		}
-		
+		IClientLevelWrapper clientLevelWrapper = (IClientLevelWrapper) wrapper;
-		return this.levels.computeIfAbsent((IClientLevelWrapper) wrapper,
+		clientLevelWrapper.markAccessed();
-			(clientLevelWrapper) ->
+		DhClientLevel storedLevel = this.levels.computeIfAbsent(wrapper.getDhIdentifier(),
+			(key) -> createClientLevel(clientLevelWrapper)
+		);
+		if (storedLevel != null && storedLevel.getClientLevelWrapper() != wrapper) {
+			unloadLevel(storedLevel.getLevelWrapper());
+			storedLevel = createClientLevel(clientLevelWrapper);
+			if (storedLevel != null)
 			{
-				try
+				this.levels.put(wrapper.getDhIdentifier(), storedLevel);
-				{
+			}
-					return new DhClientLevel(this.saveStructure, clientLevelWrapper, this.networkState);
+		}
-				}
+		return storedLevel;
-				catch (Exception e)
-				{
-					LOGGER.fatal("Failed to load client level, error: ["+e.getMessage()+"].", e);
-					
-					ClientApi.INSTANCE.showChatMessageNextFrame(
-						MinecraftTextFormat.RED + "Distant Horizons: Client level loading failed." + MinecraftTextFormat.CLEAR_FORMATTING + "\n" +
-						"Unable to load level ["+clientLevelWrapper.getDhIdentifier()+"], LODs may not appear. See log for more information.");
-					
-					return null;
-				}
-			});
 	}
 	
 	@Override
@@ -112,7 +134,7 @@ public class DhClientWorld extends AbstractDhWorld implements IDhClientWorld
 			return null;
 		}
 		
-		return this.levels.get(wrapper);
+		return this.levels.get(wrapper.getDhIdentifier());
 	}
 	
 	@Override
@@ -121,19 +143,26 @@ public class DhClientWorld extends AbstractDhWorld implements IDhClientWorld
 	public int getLoadedLevelCount() { return this.levels.size(); }
 	
 	@Override
-	public void unloadLevel(@NotNull ILevelWrapper wrapper)
+	public boolean unloadLevel(@NotNull ILevelWrapper wrapper)
 	{
 		if (!(wrapper instanceof IClientLevelWrapper))
 		{
-			return;
+			return false;
 		}
 		
-		if (this.levels.containsKey(wrapper))
+		if (this.levels.containsKey(wrapper.getDhIdentifier()))
 		{
-			LOGGER.info("Unloading level " + this.levels.get(wrapper));
+			LOGGER.info("Unloading level " + this.levels.get(wrapper.getDhIdentifier()));
 			wrapper.onUnload();
-			this.levels.remove(wrapper).close();
+			Set<IClientLevelWrapper> wrappers = this.levelWrappers.get(wrapper.getDhIdentifier());
+			wrappers.remove(wrapper);
+			if (wrappers.isEmpty()) {
+				this.levels.remove(wrapper.getDhIdentifier()).close();
+			}
+			ApiEventInjector.INSTANCE.fireAllEvents(DhApiLevelUnloadEvent.class, new DhApiLevelUnloadEvent.EventParam(wrapper));
+			return true;
 		}
+		return false;
 	}
 	
 	@Override
@@ -156,6 +185,7 @@ public class DhClientWorld extends AbstractDhWorld implements IDhClientWorld
 			if (clientLevelWrapper != null)
 			{
 				clientLevelWrapper.onUnload();
+				ApiEventInjector.INSTANCE.fireAllEvents(DhApiLevelUnloadEvent.class, new DhApiLevelUnloadEvent.EventParam(clientLevelWrapper));
 			}
 			
 			
@@ -178,6 +208,7 @@ public class DhClientWorld extends AbstractDhWorld implements IDhClientWorld
 		}
 		
 		this.levels.clear();
+		this.levelWrappers.clear();
 		this.clientTickTimer.cancel();
 		LOGGER.info("Closed DhWorld of type [" + this.environment + "].");
 	}

core/src/main/java/com/seibel/distanthorizons/core/world/DhServerWorld.java

@@ -19,12 +19,15 @@
 
 package com.seibel.distanthorizons.core.world;
 
+import com.seibel.distanthorizons.api.methods.events.abstractEvents.DhApiLevelLoadEvent;
+import com.seibel.distanthorizons.api.methods.events.abstractEvents.DhApiLevelUnloadEvent;
 import com.seibel.distanthorizons.core.api.internal.ClientApi;
 import com.seibel.distanthorizons.core.enums.MinecraftTextFormat;
 import com.seibel.distanthorizons.core.generation.PregenManager;
 import com.seibel.distanthorizons.core.level.DhServerLevel;
 import com.seibel.distanthorizons.core.wrapperInterfaces.world.ILevelWrapper;
 import com.seibel.distanthorizons.core.wrapperInterfaces.world.IServerLevelWrapper;
+import com.seibel.distanthorizons.coreapi.DependencyInjection.ApiEventInjector;
 import org.jetbrains.annotations.NotNull;
 
 import java.util.concurrent.CompletableFuture;
@@ -64,7 +67,9 @@ public class DhServerWorld extends AbstractDhServerWorld<DhServerLevel>
 			{
 				try
 				{
-					return new DhServerLevel(this.saveStructure, (IServerLevelWrapper) serverLevelWrapper, this.getServerPlayerStateManager());
+					DhServerLevel level = new DhServerLevel(this.saveStructure, (IServerLevelWrapper) serverLevelWrapper, this.getServerPlayerStateManager());
+					ApiEventInjector.INSTANCE.fireAllEvents(DhApiLevelLoadEvent.class, new DhApiLevelLoadEvent.EventParam(wrapper));
+					return level;
 				}
 				catch (Exception e)
 				{
@@ -80,19 +85,21 @@ public class DhServerWorld extends AbstractDhServerWorld<DhServerLevel>
 	}
 	
 	@Override
-	public void unloadLevel(@NotNull ILevelWrapper wrapper)
+	public boolean unloadLevel(@NotNull ILevelWrapper wrapper)
 	{
 		if (!(wrapper instanceof IServerLevelWrapper))
 		{
-			return;
+			return false;
 		}
 		
 		if (this.dhLevelByLevelWrapper.containsKey(wrapper))
 		{
-			DhServerLevel level = this.dhLevelByLevelWrapper.get(wrapper);
 			wrapper.onUnload();
 			this.dhLevelByLevelWrapper.remove(wrapper).close();
+			ApiEventInjector.INSTANCE.fireAllEvents(DhApiLevelUnloadEvent.class, new DhApiLevelUnloadEvent.EventParam(wrapper));
+			return true;
 		}
+		return false;
 	}
 	
 	@Override

core/src/main/java/com/seibel/distanthorizons/core/world/IDhWorld.java

@@ -49,6 +49,6 @@ public interface IDhWorld extends Closeable
 	Iterable<? extends IDhLevel> getAllLoadedLevels();
 	int getLoadedLevelCount();
 	
-	void unloadLevel(@NotNull ILevelWrapper levelWrapper);
+	boolean unloadLevel(@NotNull ILevelWrapper levelWrapper);
 	
 }

core/src/main/java/com/seibel/distanthorizons/core/wrapperInterfaces/minecraft/IMinecraftRenderWrapper.java

@@ -96,8 +96,6 @@ public interface IMinecraftRenderWrapper extends IBindable
 	@Nullable
 	ILightMapWrapper getLightmapWrapper(@NotNull ILevelWrapper level);
 	
-	float getShade(EDhDirection lodDirection);
-	
 	
 	
 }

core/src/main/java/com/seibel/distanthorizons/core/wrapperInterfaces/minecraft/IMinecraftSharedWrapper.java

@@ -19,6 +19,7 @@
 
 package com.seibel.distanthorizons.core.wrapperInterfaces.minecraft;
 
+import com.seibel.distanthorizons.core.wrapperInterfaces.world.IServerLevelWrapper;
 import com.seibel.distanthorizons.coreapi.interfaces.dependencyInjection.IBindable;
 
 import java.io.File;
@@ -31,6 +32,6 @@ public interface IMinecraftSharedWrapper extends IBindable
 	
 	int getPlayerCount();
 	
-	
+	IServerLevelWrapper getWrappedServerLevel(String levelKey);
 	
 }

core/src/main/java/com/seibel/distanthorizons/core/wrapperInterfaces/modAccessor/IImmersivePortalsAccessor.java

@@ -0,0 +1,47 @@
+/*
+ *    This file is part of the Distant Horizons mod
+ *    licensed under the GNU LGPL v3 License.
+ *
+ *    Copyright (C) 2020 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.core.wrapperInterfaces.modAccessor;
+
+import com.seibel.distanthorizons.core.pos.DhChunkPos;
+import com.seibel.distanthorizons.core.pos.blockPos.DhBlockPos;
+import com.seibel.distanthorizons.core.util.math.Vec3d;
+import com.seibel.distanthorizons.core.wrapperInterfaces.world.IClientLevelWrapper;
+import org.jetbrains.annotations.Nullable;
+
+public interface IImmersivePortalsAccessor extends IModAccessor
+{
+	
+	boolean isRenderingPortal();
+	
+	boolean wasPortalRecentlyVisible();
+	
+	@Nullable
+	DhBlockPos getOriginalPlayerBlockPos();
+	
+	@Nullable
+	DhChunkPos getOriginalPlayerChunkPos();
+	
+	@Nullable
+	IClientLevelWrapper getOriginalClientLevelWrapper();
+	
+	@Nullable
+	Vec3d getOriginalCameraPos();
+	
+}

core/src/main/java/com/seibel/distanthorizons/core/wrapperInterfaces/modAccessor/ImmersivePortalsAbstractAccessor.java

@@ -0,0 +1,369 @@
+/*
+ *    This file is part of the Distant Horizons mod
+ *    licensed under the GNU LGPL v3 License.
+ *
+ *    Copyright (C) 2020 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.core.wrapperInterfaces.modAccessor;
+
+import com.seibel.distanthorizons.api.DhApi;
+import com.seibel.distanthorizons.api.methods.events.abstractEvents.DhApiBeforeRenderEvent;
+import com.seibel.distanthorizons.api.methods.events.sharedParameterObjects.DhApiCancelableEventParam;
+import com.seibel.distanthorizons.api.methods.events.sharedParameterObjects.DhApiRenderParam;
+import com.seibel.distanthorizons.core.logging.DhLogger;
+import com.seibel.distanthorizons.core.logging.DhLoggerBuilder;
+import org.jetbrains.annotations.NotNull;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodType;
+import java.lang.reflect.Method;
+import java.lang.reflect.Modifier;
+import java.util.List;
+import java.util.function.Supplier;
+
+public abstract class ImmersivePortalsAbstractAccessor implements IImmersivePortalsAccessor
+{
+	private static final DhLogger LOGGER = new DhLoggerBuilder().build();
+	
+	private static Class<?> portalClass;
+	private static MethodHandle isRenderingMethodHandle;
+	private static Method shouldSkipRenderingPortalMethod;
+	private static MethodHandle getGlobalPortalsMethodHandle;
+	
+	private static long lastPortalMsTime = -1;
+	private static boolean portalVisible = false;
+	
+	
+	
+	//=============//
+	// constructor //
+	//=============//
+	//region
+	
+	public ImmersivePortalsAbstractAccessor() 
+	{
+		LOGGER.info("Immersive Portals detected: some DH features will be disabled or may only partially function.");
+		
+		BeforeRenderEvent event = new BeforeRenderEvent(this);
+		DhApi.events.bind(DhApiBeforeRenderEvent.class, event); 
+	}
+	
+	//endregion
+	
+	
+	//=====================//
+	// reflection handling //
+	//=====================//
+	//region
+	
+	private static Class<?> getPortalRenderingClass()
+	{
+		try
+		{
+			return Class.forName("qouteall.imm_ptl.core.render.context_management.PortalRendering");
+		}
+		catch (ClassNotFoundException first)
+		{
+			try
+			{
+				return Class.forName("com.qouteall.immersive_portals.render.context_management.PortalRendering"); // 1.16
+			}
+			catch (ClassNotFoundException second)
+			{
+				RuntimeException err = new RuntimeException(first);
+				err.addSuppressed(second);
+				throw err;
+			}
+		}
+	}
+	
+	private static Class<?> getPortalRendererClass()
+	{
+		try
+		{
+			return Class.forName("qouteall.imm_ptl.core.render.renderer.PortalRenderer"); // 1.21+
+		}
+		catch (ClassNotFoundException first)
+		{
+			try
+			{
+				return Class.forName("qouteall.imm_ptl.core.render.PortalRenderer");
+			}
+			catch (ClassNotFoundException second)
+			{
+				try
+				{
+					return Class.forName("com.qouteall.immersive_portals.render.PortalRenderer"); // 1.16
+				}
+				catch (ClassNotFoundException third)
+				{
+					RuntimeException err = new RuntimeException(first);
+					err.addSuppressed(second);
+					err.addSuppressed(third);
+					throw err;
+				}
+			}
+		}
+	}
+	
+	private static Class<?> getPortalClass()
+	{
+		try
+		{
+			portalClass = Class.forName("qouteall.imm_ptl.core.portal.Portal");
+		}
+		catch (ClassNotFoundException first)
+		{
+			try
+			{
+				portalClass = Class.forName("com.qouteall.immersive_portals.portal.Portal"); // 1.16
+			}
+			catch (ClassNotFoundException second)
+			{
+				RuntimeException err = new RuntimeException(first);
+				err.addSuppressed(second);
+				throw err;
+			}
+		}
+		return portalClass;
+	}
+	
+	private static Class<?> getGlobalPortalStorageClass()
+	{
+		try
+		{
+			return Class.forName("qouteall.imm_ptl.core.portal.global_portals.GlobalPortalStorage");
+		}
+		catch (ClassNotFoundException first)
+		{
+			try
+			{
+				return Class.forName("com.qouteall.immersive_portals.McHelper"); // 1.16
+			}
+			catch (ClassNotFoundException second)
+			{
+				RuntimeException err = new RuntimeException(first);
+				err.addSuppressed(second);
+				throw err;
+			}
+		}
+	}
+	
+	private static Class<?> getIPCGlobalClass()
+	{
+		try
+		{
+			return Class.forName("qouteall.imm_ptl.core.IPCGlobal");
+		}
+		catch (ClassNotFoundException first)
+		{
+			try
+			{
+				return Class.forName("com.qouteall.immersive_portals.CGlobal"); // 1.16
+			}
+			catch (ClassNotFoundException second)
+			{
+				RuntimeException err = new RuntimeException(first);
+				err.addSuppressed(second);
+				throw err;
+			}
+		}
+	}
+	
+	private static boolean shouldSkipRenderingPortal(Object portal, Supplier<?> frustumSupplier)
+	{
+		try
+		{
+			if (shouldSkipRenderingPortalMethod == null)
+			{
+				shouldSkipRenderingPortalMethod = getPortalRendererClass().getDeclaredMethod(
+					"shouldSkipRenderingPortal", getPortalClass(), Supplier.class
+				);
+				shouldSkipRenderingPortalMethod.setAccessible(true);
+			}
+			if (Modifier.isStatic(shouldSkipRenderingPortalMethod.getModifiers()))
+			{
+				return (boolean) shouldSkipRenderingPortalMethod.invoke(null, portal, frustumSupplier);
+			}
+			else
+			{
+				return (boolean) shouldSkipRenderingPortalMethod.invoke(
+					getIPCGlobalClass().getField("renderer").get(null), portal, frustumSupplier
+				);
+			}
+		}
+		catch (Throwable e)
+		{
+			throw new RuntimeException(e);
+		}
+	}
+	
+	protected abstract Object getClientLevel();
+	
+	protected abstract Class<?> getLevelClass();
+	
+	protected abstract Iterable<?> getEntitiesForRendering();
+	
+	protected abstract Supplier<?> getFrustumSupplier();
+	
+	private List<?> getGlobalPortals(Object level)
+	{
+		try
+		{
+			if (getGlobalPortalsMethodHandle == null)
+			{
+				getGlobalPortalsMethodHandle = MethodHandles.lookup().findStatic(
+					getGlobalPortalStorageClass(),
+					"getGlobalPortals", MethodType.methodType(List.class).appendParameterTypes(
+						getLevelClass()
+					)
+				);
+			}
+			
+			return (List<?>) getGlobalPortalsMethodHandle.invoke(level);
+		}
+		catch (Throwable e)
+		{
+			throw new RuntimeException(e);
+		}
+	}
+	
+	//endregion
+	
+	
+	
+	//===========//
+	// overrides //
+	//===========//
+	//region
+	
+	@Override
+	public boolean isRenderingPortal()
+	{
+		try
+		{
+			if (isRenderingMethodHandle == null)
+			{
+				isRenderingMethodHandle = MethodHandles.lookup().findStatic(
+					getPortalRenderingClass(),
+					"isRendering", MethodType.methodType(Boolean.TYPE)
+				);
+			}
+			
+			return (boolean) isRenderingMethodHandle.invoke();
+		}
+		catch (Throwable e)
+		{
+			throw new RuntimeException(e);
+		}
+	}
+	
+	@Override
+	public boolean wasPortalRecentlyVisible()
+	{
+		// I did consider setting portalVisible to true whenever PortalRendering::isRendering was true instead,
+		// but that would still render fading immediately after startup before entering the portal at least once.
+		// This is more robust, but slightly worse for performance. Still, people can just turn fading off if they have issues.
+		boolean isPortalVisible = isPortalVisibleRightNow();
+		if (isPortalVisible)
+		{
+			lastPortalMsTime = System.currentTimeMillis();
+			portalVisible = true;
+		}
+		else if (portalVisible)
+		{
+			if (System.currentTimeMillis() - lastPortalMsTime > 1000)
+			{
+				portalVisible = false;
+			}
+		}
+		
+		// Simply checking portal visibility right now is not sufficient, that will still render the fading on top of the portal.
+		// Instead, we check if a portal was rendered during the last second or so.
+		return portalVisible;
+	}
+	
+	/** Essentially reimplements PortalRenderer::getPortalsToRender because it did not exist in 1.16. */
+	private boolean isPortalVisibleRightNow()
+	{
+		Supplier<?> frustumSupplier = getFrustumSupplier();
+		if (frustumSupplier == null)
+		{
+			return false;
+		}
+		
+		for (Object portal : getGlobalPortals(getClientLevel()))
+		{
+			if (!shouldSkipRenderingPortal(portal, frustumSupplier))
+			{
+				return true;
+			}
+		}
+		
+		for (Object entity : getEntitiesForRendering())
+		{
+			if (isPortalObject(entity)
+				&& !shouldSkipRenderingPortal(entity, frustumSupplier))
+			{
+				return true;
+			}
+		}
+		
+		return false;
+	}
+	private static boolean isPortalObject(Object object) { return getPortalClass().isInstance(object); }
+	
+	
+	//endregion
+	
+	@Override
+	public String getModName() { return "Immersive Portals"; }
+	
+	
+	
+	//=======//
+	// event //
+	//=======//
+	//region
+	
+	private static class BeforeRenderEvent extends DhApiBeforeRenderEvent
+	{
+		@NotNull
+		private final IImmersivePortalsAccessor immersivePortals;
+		
+		
+		public BeforeRenderEvent(@NotNull IImmersivePortalsAccessor portalAccessor) { this.immersivePortals = portalAccessor; }
+		
+		
+		@Override
+		public void beforeRender(DhApiCancelableEventParam<DhApiRenderParam> event)
+		{
+			// needed because otherwise DH doesn't render to the level anyway
+			// and will probably render the level the player is currently in instead
+			if (this.immersivePortals.isRenderingPortal())
+			{
+				event.cancelEvent();
+			}
+		}
+		
+	}
+	
+	//endregion
+	
+	
+	
+}

core/src/main/java/com/seibel/distanthorizons/core/wrapperInterfaces/world/IClientLevelWrapper.java

@@ -20,6 +20,7 @@
 package com.seibel.distanthorizons.core.wrapperInterfaces.world;
 
 import com.seibel.distanthorizons.core.dataObjects.fullData.sources.FullDataSourceV2;
+import com.seibel.distanthorizons.core.enums.EDhDirection;
 import com.seibel.distanthorizons.core.pos.blockPos.DhBlockPos;
 import com.seibel.distanthorizons.core.wrapperInterfaces.block.IBlockStateWrapper;
 import org.jetbrains.annotations.Nullable;
@@ -29,6 +30,9 @@ import java.awt.*;
 public interface IClientLevelWrapper extends ILevelWrapper
 {
 	
+	/** used to track when this level was last used for Immersive portals support */
+	void markAccessed();
+	
 	@Nullable
 	IServerLevelWrapper tryGetServerSideWrapper();
 	
@@ -39,4 +43,6 @@ public interface IClientLevelWrapper extends ILevelWrapper
 	
 	Color getCloudColor(float tickDelta);
 	
+	float getShade(EDhDirection lodDirection);
+	
 }

core/src/main/resources/assets/distanthorizons/lang/en_us.json

@@ -28,7 +28,10 @@
     "API LOCK",
   "distanthorizons.general.disabledByApi.@tooltip":
     "This option is controlled by another mod via DH's API \nso it cannot be changed via the UI or config file.",
-
+  "distanthorizons.general.unsupportedMcVersion":
+    "VER LOCK",
+  "distanthorizons.general.unsupportedMcVersion.@tooltip":
+    "DH doesn't support changing this option on this version of Minecraft. \nAny config file or API set values will be ignored.",
 
 
 

core/src/test/java/tests/PooledDataSourceCheckoutTest.java

@@ -39,7 +39,13 @@ import org.junit.Test;
 public class PooledDataSourceCheckoutTest
 {
 	
-	@Test
+	/**
+	 * commented out for now since it has
+	 * a chance of breaking if any other tests
+	 * using the same pools run at the same time
+	 * or before this one.
+	 */
+	//@Test
 	public void TestCheckouts()
 	{
 		// something like this should probably be called before starting the test to ensure