diff --git a/src/main/java/de/bixilon/minosoft/config/StaticConfiguration.java b/src/main/java/de/bixilon/minosoft/config/StaticConfiguration.java
index 8070ecab7..be9d26926 100644
--- a/src/main/java/de/bixilon/minosoft/config/StaticConfiguration.java
+++ b/src/main/java/de/bixilon/minosoft/config/StaticConfiguration.java
@@ -20,6 +20,7 @@ import java.io.File;
 
 public class StaticConfiguration {
     public static final boolean DEBUG_MODE = true; // if true, additional checks will be made to validate data, ... Decreases performance
+    public static final boolean BIOME_DEBUG_MODE = true; // colors all biomes according to the biome hashCode
     public static final boolean DEBUG_SLOW_LOADING = false; // if true, many Thread.sleep will be executed and the start will be delayed (by a lot)
     public static String CONFIG_FILENAME = "minosoft.json"; // Filename of minosoft's base configuration (located in AppData/Minosoft/config)
     public static boolean SKIP_MOJANG_AUTHENTICATION; // disables all connections to mojang
diff --git a/src/main/java/de/bixilon/minosoft/data/mappings/tweaker/VersionTweaker.kt b/src/main/java/de/bixilon/minosoft/data/mappings/tweaker/VersionTweaker.kt
index af501c535..799685306 100644
--- a/src/main/java/de/bixilon/minosoft/data/mappings/tweaker/VersionTweaker.kt
+++ b/src/main/java/de/bixilon/minosoft/data/mappings/tweaker/VersionTweaker.kt
@@ -20,7 +20,10 @@ import de.bixilon.minosoft.data.entities.entities.monster.*
 import de.bixilon.minosoft.data.entities.entities.vehicle.*
 import de.bixilon.minosoft.data.mappings.ResourceLocation
 import de.bixilon.minosoft.data.mappings.blocks.BlockState
-import de.bixilon.minosoft.data.world.*
+import de.bixilon.minosoft.data.world.BlockInfo
+import de.bixilon.minosoft.data.world.Chunk
+import de.bixilon.minosoft.data.world.InChunkLocation
+import de.bixilon.minosoft.data.world.InChunkSectionLocation
 import de.bixilon.minosoft.protocol.protocol.ProtocolDefinition
 import de.bixilon.minosoft.protocol.protocol.ProtocolVersions
 
@@ -100,7 +103,7 @@ object VersionTweaker {
                     section.setBlockInfo(location, null)
                     continue
                 }
-                section.setBlockInfo(location, BlockInfo(newBlock, blockInfo.metaData, section.blocksFloatingInfo[location] ?: BlockFloatingInfo()))
+                section.setBlockInfo(location, BlockInfo(newBlock, blockInfo.metaData))
             }
         }
         return chunk
diff --git a/src/main/java/de/bixilon/minosoft/data/text/RGBColor.java b/src/main/java/de/bixilon/minosoft/data/text/RGBColor.java
index 0c2094744..b276abcde 100644
--- a/src/main/java/de/bixilon/minosoft/data/text/RGBColor.java
+++ b/src/main/java/de/bixilon/minosoft/data/text/RGBColor.java
@@ -38,7 +38,15 @@ public final class RGBColor implements ChatCode {
         if (colorString.startsWith("#")) {
             colorString = colorString.substring(1);
         }
-        this.color = Integer.parseInt(colorString, 16);
+        if (colorString.length() == 6) {
+            this.color = Integer.parseUnsignedInt(colorString + "ff", 16);
+        } else {
+            this.color = Integer.parseUnsignedInt(colorString, 16);
+        }
+    }
+
+    public static RGBColor noAlpha(int color) {
+        return new RGBColor(color << 8 | 0xFF);
     }
 
     @IntRange(from = 0, to = 255)
@@ -51,16 +59,31 @@ public final class RGBColor implements ChatCode {
         return (this.color >>> 24) & 0xFF;
     }
 
+    @IntRange(from = 0, to = 1)
+    public float getFloatRed() {
+        return getRed() / 255f;
+    }
+
     @IntRange(from = 0, to = 255)
     public int getGreen() {
         return (this.color >>> 16) & 0xFF;
     }
 
+    @IntRange(from = 0, to = 1)
+    public float getFloatGreen() {
+        return getGreen() / 255f;
+    }
+
     @IntRange(from = 0, to = 255)
     public int getBlue() {
         return (this.color >>> 8) & 0xFF;
     }
 
+    @IntRange(from = 0, to = 1)
+    public float getFloatBlue() {
+        return getBlue() / 255f;
+    }
+
     @Override
     public int hashCode() {
         return this.color;
@@ -86,8 +109,4 @@ public final class RGBColor implements ChatCode {
     public int getColor() {
         return this.color;
     }
-
-    public static RGBColor noAlpha(int color) {
-        return new RGBColor(color << 8 | 0xFF);
-    }
 }
diff --git a/src/main/java/de/bixilon/minosoft/data/world/BlockInfo.kt b/src/main/java/de/bixilon/minosoft/data/world/BlockInfo.kt
index 7ab6b40bf..77790f04c 100644
--- a/src/main/java/de/bixilon/minosoft/data/world/BlockInfo.kt
+++ b/src/main/java/de/bixilon/minosoft/data/world/BlockInfo.kt
@@ -19,7 +19,6 @@ import de.bixilon.minosoft.data.mappings.blocks.BlockState
 data class BlockInfo(
     val block: BlockState,
     var metaData: BlockEntityMetaData? = null,
-    val info: BlockFloatingInfo = BlockFloatingInfo(),
 ) {
     constructor(block: BlockState) : this(block, null) // ToDo: For java compatibility
 }
diff --git a/src/main/java/de/bixilon/minosoft/data/world/Chunk.kt b/src/main/java/de/bixilon/minosoft/data/world/Chunk.kt
index 3a0c1d31d..32ae373ae 100644
--- a/src/main/java/de/bixilon/minosoft/data/world/Chunk.kt
+++ b/src/main/java/de/bixilon/minosoft/data/world/Chunk.kt
@@ -13,12 +13,16 @@
 package de.bixilon.minosoft.data.world
 
 import de.bixilon.minosoft.data.mappings.blocks.BlockState
+import de.bixilon.minosoft.data.world.biome.BiomeAccessor
 import java.util.*
 
 /**
  * Collection of chunks sections (allocated in y)
  */
-class Chunk(val sections: MutableMap<Int, ChunkSection> = mutableMapOf()) {
+class Chunk(
+    val sections: MutableMap<Int, ChunkSection> = mutableMapOf(),
+    var biomeAccessor: BiomeAccessor,
+) {
 
     fun getBlockInfo(location: InChunkLocation): BlockInfo? {
         return sections[location.getSectionHeight()]?.getBlockInfo(location.getInChunkSectionLocation())
@@ -51,7 +55,7 @@ class Chunk(val sections: MutableMap<Int, ChunkSection> = mutableMapOf()) {
                 it.blocks.remove(inChunkSectionLocation)
                 return
             }
-            it.setBlockInfo(inChunkSectionLocation, BlockInfo(block, info = it.blocksFloatingInfo[inChunkSectionLocation] ?: BlockFloatingInfo()))
+            it.setBlockInfo(inChunkSectionLocation, BlockInfo(block))
         }
 
     }
diff --git a/src/main/java/de/bixilon/minosoft/data/world/ChunkSection.kt b/src/main/java/de/bixilon/minosoft/data/world/ChunkSection.kt
index 8c4bdd537..1e7040ff1 100644
--- a/src/main/java/de/bixilon/minosoft/data/world/ChunkSection.kt
+++ b/src/main/java/de/bixilon/minosoft/data/world/ChunkSection.kt
@@ -19,7 +19,6 @@ import de.bixilon.minosoft.data.mappings.blocks.BlockState
  */
 class ChunkSection constructor(
     val blocks: MutableMap<InChunkSectionLocation, BlockInfo> = mutableMapOf(),
-    val blocksFloatingInfo: MutableMap<InChunkSectionLocation, BlockFloatingInfo> = mutableMapOf(),
 ) {
 
     fun getBlockInfo(location: InChunkSectionLocation): BlockInfo? {
@@ -47,6 +46,6 @@ class ChunkSection constructor(
             setBlockInfo(location, null)
             return
         }
-        setBlockInfo(location, BlockInfo(block, info = blocksFloatingInfo[location] ?: BlockFloatingInfo()))
+        setBlockInfo(location, BlockInfo(block))
     }
 }
diff --git a/src/main/java/de/bixilon/minosoft/data/world/World.java b/src/main/java/de/bixilon/minosoft/data/world/World.java
index 55988c763..b00ac918d 100644
--- a/src/main/java/de/bixilon/minosoft/data/world/World.java
+++ b/src/main/java/de/bixilon/minosoft/data/world/World.java
@@ -22,19 +22,20 @@ import de.bixilon.minosoft.data.mappings.blocks.BlockState;
 import javax.annotation.Nullable;
 import java.util.HashMap;
 import java.util.UUID;
+import java.util.concurrent.ConcurrentHashMap;
 
 /**
  * Collection of chunks
  */
 public class World {
-    private final HashMap<ChunkLocation, Chunk> chunks = new HashMap<>();
+    private final ConcurrentHashMap<ChunkLocation, Chunk> chunks = new ConcurrentHashMap<>();
     private final HashBiMap<Integer, Entity> entityIdMap = HashBiMap.create();
     private final HashBiMap<UUID, Entity> entityUUIDMap = HashBiMap.create();
     private boolean hardcore;
     private boolean raining;
     private Dimension dimension; // used for sky color, etc
 
-    public HashMap<ChunkLocation, Chunk> getAllChunks() {
+    public ConcurrentHashMap<ChunkLocation, Chunk> getAllChunks() {
         return this.chunks;
     }
 
diff --git a/src/main/java/de/bixilon/minosoft/data/world/BlockFloatingInfo.kt b/src/main/java/de/bixilon/minosoft/data/world/biome/BiomeAccessor.kt
similarity index 82%
rename from src/main/java/de/bixilon/minosoft/data/world/BlockFloatingInfo.kt
rename to src/main/java/de/bixilon/minosoft/data/world/biome/BiomeAccessor.kt
index 1a4dd4e15..16e5479eb 100644
--- a/src/main/java/de/bixilon/minosoft/data/world/BlockFloatingInfo.kt
+++ b/src/main/java/de/bixilon/minosoft/data/world/biome/BiomeAccessor.kt
@@ -11,12 +11,12 @@
  * This software is not affiliated with Mojang AB, the original developer of Minecraft.
  */
 
-package de.bixilon.minosoft.data.world
+package de.bixilon.minosoft.data.world.biome
 
 import de.bixilon.minosoft.data.mappings.biomes.Biome
+import de.bixilon.minosoft.data.world.BlockPosition
 
-data class BlockFloatingInfo(
-    var light: Int = 15,
-    var skyLight: Int = 15,
-    var biome: Biome? = null, // ToDo
-)
+interface BiomeAccessor {
+
+    fun getBiome(position: BlockPosition): Biome
+}
diff --git a/src/main/java/de/bixilon/minosoft/data/world/biome/DummyBiomeAccessor.kt b/src/main/java/de/bixilon/minosoft/data/world/biome/DummyBiomeAccessor.kt
new file mode 100644
index 000000000..ebc331eae
--- /dev/null
+++ b/src/main/java/de/bixilon/minosoft/data/world/biome/DummyBiomeAccessor.kt
@@ -0,0 +1,23 @@
+/*
+ * Minosoft
+ * Copyright (C) 2021 Moritz Zwerger
+ *
+ * This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with this program.If not, see <https://www.gnu.org/licenses/>.
+ *
+ * This software is not affiliated with Mojang AB, the original developer of Minecraft.
+ */
+
+package de.bixilon.minosoft.data.world.biome
+
+import de.bixilon.minosoft.data.mappings.biomes.Biome
+import de.bixilon.minosoft.data.world.BlockPosition
+
+class DummyBiomeAccessor(private val biome: Biome) : BiomeAccessor {
+    override fun getBiome(position: BlockPosition): Biome {
+        return biome
+    }
+}
diff --git a/src/main/java/de/bixilon/minosoft/data/world/biome/NoiseBiomeAccessor.kt b/src/main/java/de/bixilon/minosoft/data/world/biome/NoiseBiomeAccessor.kt
new file mode 100644
index 000000000..65a29725c
--- /dev/null
+++ b/src/main/java/de/bixilon/minosoft/data/world/biome/NoiseBiomeAccessor.kt
@@ -0,0 +1,29 @@
+/*
+ * Minosoft
+ * Copyright (C) 2021 Moritz Zwerger
+ *
+ * This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with this program.If not, see <https://www.gnu.org/licenses/>.
+ *
+ * This software is not affiliated with Mojang AB, the original developer of Minecraft.
+ */
+
+package de.bixilon.minosoft.data.world.biome
+
+import de.bixilon.minosoft.data.mappings.biomes.Biome
+import de.bixilon.minosoft.data.world.BlockPosition
+
+class NoiseBiomeAccessor(
+    private val biomes: Array<Biome>,
+) : BiomeAccessor {
+
+    override fun getBiome(position: BlockPosition): Biome {
+        val inChunk = position.getInChunkSectionLocation()
+        return biomes[(inChunk.y * 16 + ((inChunk.z / 4) * 4 + (inChunk.x / 4)))]
+
+        // ToDo: This value is pseudo randomly generated. It depends on the seed of the world (received in join game).
+    }
+}
diff --git a/src/main/java/de/bixilon/minosoft/data/world/biome/XZBiomeAccessor.kt b/src/main/java/de/bixilon/minosoft/data/world/biome/XZBiomeAccessor.kt
new file mode 100644
index 000000000..e1819f9e9
--- /dev/null
+++ b/src/main/java/de/bixilon/minosoft/data/world/biome/XZBiomeAccessor.kt
@@ -0,0 +1,26 @@
+/*
+ * Minosoft
+ * Copyright (C) 2021 Moritz Zwerger
+ *
+ * This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with this program.If not, see <https://www.gnu.org/licenses/>.
+ *
+ * This software is not affiliated with Mojang AB, the original developer of Minecraft.
+ */
+
+package de.bixilon.minosoft.data.world.biome
+
+import de.bixilon.minosoft.data.mappings.biomes.Biome
+import de.bixilon.minosoft.data.world.BlockPosition
+
+class XZBiomeAccessor(
+    private val biomes: Array<Biome>,
+) : BiomeAccessor {
+
+    override fun getBiome(position: BlockPosition): Biome {
+        return biomes[(position.x and 0x0F) or ((position.z and 0x0F) shl 4)]
+    }
+}
diff --git a/src/main/java/de/bixilon/minosoft/gui/rendering/Camera.kt b/src/main/java/de/bixilon/minosoft/gui/rendering/Camera.kt
index cdffd0f28..6a994c5cb 100644
--- a/src/main/java/de/bixilon/minosoft/gui/rendering/Camera.kt
+++ b/src/main/java/de/bixilon/minosoft/gui/rendering/Camera.kt
@@ -29,7 +29,11 @@ import glm_.vec3.Vec3
 import kotlin.math.cos
 import kotlin.math.sin
 
-class Camera(private val connection: Connection, private var fov: Float) {
+class Camera(
+    private val connection: Connection,
+    private var fov: Float,
+    private val renderWindow: RenderWindow,
+) {
     private var mouseSensitivity = Minosoft.getConfig().config.game.camera.moseSensitivity
     private var movementSpeed = 7
     var cameraPosition = Vec3(0.0f, 0.0f, 0.0f)
@@ -169,6 +173,9 @@ class Camera(private val connection: Connection, private var fov: Float) {
         for (shader in shaders) {
             shader.use().setMat4("viewProjectionMatrix", calculateProjectionMatrix(screenWidth, screenHeight) * calculateViewMatrix())
         }
+        // recalculate sky color for current biome
+        val blockPosition = Location(cameraPosition).toBlockPosition()
+        renderWindow.setSkyColor(connection.player.world.getChunk(blockPosition.getChunkLocation())?.biomeAccessor?.getBiome(blockPosition)?.skyColor ?: RenderConstants.DEFAULT_SKY_COLOR)
     }
 
     private fun calculateProjectionMatrix(screenWidth: Int, screenHeight: Int): Mat4 {
diff --git a/src/main/java/de/bixilon/minosoft/gui/rendering/RenderConstants.kt b/src/main/java/de/bixilon/minosoft/gui/rendering/RenderConstants.kt
new file mode 100644
index 000000000..35f6a700d
--- /dev/null
+++ b/src/main/java/de/bixilon/minosoft/gui/rendering/RenderConstants.kt
@@ -0,0 +1,20 @@
+/*
+ * Minosoft
+ * Copyright (C) 2021 Moritz Zwerger
+ *
+ * This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with this program.If not, see <https://www.gnu.org/licenses/>.
+ *
+ * This software is not affiliated with Mojang AB, the original developer of Minecraft.
+ */
+
+package de.bixilon.minosoft.gui.rendering
+
+import de.bixilon.minosoft.data.text.RGBColor
+
+object RenderConstants {
+    val DEFAULT_SKY_COLOR = RGBColor("#ecff89")
+}
diff --git a/src/main/java/de/bixilon/minosoft/gui/rendering/RenderWindow.kt b/src/main/java/de/bixilon/minosoft/gui/rendering/RenderWindow.kt
index 3d3a3bae6..867567d30 100644
--- a/src/main/java/de/bixilon/minosoft/gui/rendering/RenderWindow.kt
+++ b/src/main/java/de/bixilon/minosoft/gui/rendering/RenderWindow.kt
@@ -20,6 +20,7 @@ import de.bixilon.minosoft.config.key.KeyAction
 import de.bixilon.minosoft.config.key.KeyBinding
 import de.bixilon.minosoft.config.key.KeyCodes
 import de.bixilon.minosoft.data.mappings.ResourceLocation
+import de.bixilon.minosoft.data.text.RGBColor
 import de.bixilon.minosoft.gui.rendering.chunk.ChunkRenderer
 import de.bixilon.minosoft.gui.rendering.hud.HUDRenderer
 import de.bixilon.minosoft.gui.rendering.hud.elements.RenderStats
@@ -110,7 +111,7 @@ class RenderWindow(private val connection: Connection, val rendering: Rendering)
             glfwTerminate()
             throw RuntimeException("Failed to create the GLFW window")
         }
-        camera = Camera(connection, Minosoft.getConfig().config.game.camera.fov)
+        camera = Camera(connection, Minosoft.getConfig().config.game.camera.fov, this)
         camera.init(this)
 
 
@@ -210,7 +211,9 @@ class RenderWindow(private val connection: Connection, val rendering: Rendering)
 
         // Make the window visible
         GL.createCapabilities()
-        glClearColor(137 / 256f, 207 / 256f, 240 / 256f, 1.0f)
+
+        setSkyColor(RGBColor("#fffe7a"))
+
         glEnable(GL_DEPTH_TEST)
         glEnable(GL_BLEND)
         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA)
@@ -370,4 +373,8 @@ class RenderWindow(private val connection: Connection, val rendering: Rendering)
         }
         resourceLocationCallbacks.add(callback)
     }
+
+    fun setSkyColor(color: RGBColor) {
+        glClearColor(color.floatRed, color.floatGreen, color.floatBlue, 1.0f)
+    }
 }
diff --git a/src/main/java/de/bixilon/minosoft/gui/rendering/chunk/ChunkRenderer.kt b/src/main/java/de/bixilon/minosoft/gui/rendering/chunk/ChunkRenderer.kt
index 45926311d..22efa00f5 100644
--- a/src/main/java/de/bixilon/minosoft/gui/rendering/chunk/ChunkRenderer.kt
+++ b/src/main/java/de/bixilon/minosoft/gui/rendering/chunk/ChunkRenderer.kt
@@ -24,6 +24,7 @@ import de.bixilon.minosoft.gui.rendering.textures.Texture
 import de.bixilon.minosoft.gui.rendering.textures.TextureArray
 import de.bixilon.minosoft.protocol.network.Connection
 import de.bixilon.minosoft.protocol.protocol.ProtocolDefinition
+import de.bixilon.minosoft.util.logging.Log
 import glm_.vec3.Vec3
 import org.lwjgl.opengl.GL11.GL_CULL_FACE
 import org.lwjgl.opengl.GL11.glEnable
@@ -37,11 +38,9 @@ class ChunkRenderer(private val connection: Connection, private val world: World
     private var currentTick = 0 // for animation usage
     private var lastTickIncrementTime = 0L
 
-    private fun prepareChunk(chunkLocation: ChunkLocation, sectionHeight: Int, section: ChunkSection): FloatArray {
+    private fun prepareChunk(chunkLocation: ChunkLocation, sectionHeight: Int, section: ChunkSection, chunk: Chunk): FloatArray {
         val data: MutableList<Float> = mutableListOf()
 
-        // ToDo: Greedy meshing!
-
         val below = world.allChunks[chunkLocation]?.sections?.get(sectionHeight - 1)
         val above = world.allChunks[chunkLocation]?.sections?.get(sectionHeight + 1)
         //val north = (world.allChunks[chunkLocation.getLocationByDirection(Directions.NORTH)]?: throw ChunkNotLoadedException("North not loaded")).sections?.get(sectionHeight)
@@ -86,7 +85,12 @@ class ChunkRenderer(private val connection: Connection, private val world: World
             }
             val worldPosition = Vec3(position.x + chunkLocation.x * ProtocolDefinition.SECTION_WIDTH_X, position.y + sectionHeight * ProtocolDefinition.SECTION_HEIGHT_Y, position.z + chunkLocation.z * ProtocolDefinition.SECTION_WIDTH_Z)
 
-            blockInfo.block.getBlockRenderer(BlockPosition(chunkLocation, sectionHeight, position)).render(blockInfo, worldPosition, data, arrayOf(blockBelow, blockAbove, blockNorth, blockSouth, blockWest, blockEast))
+            val blockPosition = BlockPosition(chunkLocation, sectionHeight, position)
+            if (blockPosition == BlockPosition(-103, 3, 288)) {
+                Log.debug("")
+            }
+            val biome = chunk.biomeAccessor.getBiome(blockPosition)
+            blockInfo.block.getBlockRenderer(blockPosition).render(blockInfo, biome, worldPosition, data, arrayOf(blockBelow, blockAbove, blockNorth, blockSouth, blockWest, blockEast))
         }
         return data.toFloatArray()
     }
@@ -142,13 +146,13 @@ class ChunkRenderer(private val connection: Connection, private val world: World
     fun prepareChunk(chunkLocation: ChunkLocation, chunk: Chunk) {
         chunkSectionsToDraw[chunkLocation] = ConcurrentHashMap()
         for ((sectionHeight, section) in chunk.sections) {
-            prepareChunkSection(chunkLocation, sectionHeight, section)
+            prepareChunkSection(chunkLocation, sectionHeight, section, chunk)
         }
     }
 
-    fun prepareChunkSection(chunkLocation: ChunkLocation, sectionHeight: Int, section: ChunkSection) {
+    fun prepareChunkSection(chunkLocation: ChunkLocation, sectionHeight: Int, section: ChunkSection, chunk: Chunk) {
         renderWindow.rendering.executor.execute {
-            val data = prepareChunk(chunkLocation, sectionHeight, section)
+            val data = prepareChunk(chunkLocation, sectionHeight, section, chunk)
 
             var sectionMap = chunkSectionsToDraw[chunkLocation]
             if (sectionMap == null) {
diff --git a/src/main/java/de/bixilon/minosoft/gui/rendering/chunk/models/renderable/BlockRenderer.kt b/src/main/java/de/bixilon/minosoft/gui/rendering/chunk/models/renderable/BlockRenderer.kt
index 36ee7678c..e0a7b840f 100644
--- a/src/main/java/de/bixilon/minosoft/gui/rendering/chunk/models/renderable/BlockRenderer.kt
+++ b/src/main/java/de/bixilon/minosoft/gui/rendering/chunk/models/renderable/BlockRenderer.kt
@@ -14,7 +14,9 @@
 package de.bixilon.minosoft.gui.rendering.chunk.models.renderable
 
 import com.google.gson.JsonObject
+import de.bixilon.minosoft.config.StaticConfiguration
 import de.bixilon.minosoft.data.Directions
+import de.bixilon.minosoft.data.mappings.biomes.Biome
 import de.bixilon.minosoft.data.text.RGBColor
 import de.bixilon.minosoft.data.world.BlockInfo
 import de.bixilon.minosoft.gui.rendering.chunk.models.loading.BlockModel
@@ -69,7 +71,7 @@ class BlockRenderer(data: JsonObject, parent: BlockModel) {
         }
     }
 
-    fun render(blockInfo: BlockInfo, position: Vec3, data: MutableList<Float>, neighbourBlocks: Array<BlockInfo?>) {
+    fun render(blockInfo: BlockInfo, biome: Biome, position: Vec3, data: MutableList<Float>, neighbourBlocks: Array<BlockInfo?>) {
         val modelMatrix = Mat4().translate(position)
 
         for (direction in Directions.DIRECTIONS) {
@@ -90,8 +92,11 @@ class BlockRenderer(data: JsonObject, parent: BlockModel) {
                     continue
                 }
 
-                val tintColor: RGBColor? = blockInfo.block.tintColor
+                var tintColor: RGBColor? = blockInfo.block.tintColor
 
+                if (StaticConfiguration.BIOME_DEBUG_MODE) {
+                    tintColor = RGBColor(biome.hashCode())
+                }
                 element.render(tintColor, textureMapping, modelMatrix, direction, data)
             }
         }
diff --git a/src/main/java/de/bixilon/minosoft/protocol/packets/clientbound/play/PacketBlockChange.java b/src/main/java/de/bixilon/minosoft/protocol/packets/clientbound/play/PacketBlockChange.java
index 51bb22afa..1ede39c72 100644
--- a/src/main/java/de/bixilon/minosoft/protocol/packets/clientbound/play/PacketBlockChange.java
+++ b/src/main/java/de/bixilon/minosoft/protocol/packets/clientbound/play/PacketBlockChange.java
@@ -63,7 +63,7 @@ public class PacketBlockChange extends ClientboundPacket {
             section.setRawBlock(getPosition().getInChunkLocation().getInChunkSectionLocation(), getBlock());
         }
 
-        connection.getRenderer().getRenderWindow().getChunkRenderer().prepareChunkSection(getPosition().getChunkLocation(), sectionHeight, section);
+        connection.getRenderer().getRenderWindow().getChunkRenderer().prepareChunkSection(getPosition().getChunkLocation(), sectionHeight, section, chunk);
     }
 
     @Override
diff --git a/src/main/java/de/bixilon/minosoft/protocol/packets/clientbound/play/PacketChunkData.java b/src/main/java/de/bixilon/minosoft/protocol/packets/clientbound/play/PacketChunkData.java
index 046299329..60b92fbbd 100644
--- a/src/main/java/de/bixilon/minosoft/protocol/packets/clientbound/play/PacketChunkData.java
+++ b/src/main/java/de/bixilon/minosoft/protocol/packets/clientbound/play/PacketChunkData.java
@@ -19,6 +19,8 @@ import de.bixilon.minosoft.data.mappings.tweaker.VersionTweaker;
 import de.bixilon.minosoft.data.world.BlockPosition;
 import de.bixilon.minosoft.data.world.Chunk;
 import de.bixilon.minosoft.data.world.ChunkLocation;
+import de.bixilon.minosoft.data.world.biome.BiomeAccessor;
+import de.bixilon.minosoft.data.world.biome.NoiseBiomeAccessor;
 import de.bixilon.minosoft.modding.event.events.BlockEntityMetaDataChangeEvent;
 import de.bixilon.minosoft.modding.event.events.ChunkDataChangeEvent;
 import de.bixilon.minosoft.protocol.network.Connection;
@@ -38,7 +40,6 @@ public class PacketChunkData extends ClientboundPacket {
     private ChunkLocation location;
     private Chunk chunk;
     private CompoundTag heightMap;
-    private int[] biomes;
     private boolean ignoreOldData;
 
     @Override
@@ -84,12 +85,9 @@ public class PacketChunkData extends ClientboundPacket {
         if (buffer.getVersionId() >= V_18W44A) {
             this.heightMap = (CompoundTag) buffer.readNBT();
         }
+        BiomeAccessor biomeAccessor = null;
         if (fullChunk) {
-            if (buffer.getVersionId() >= V_20W28A) {
-                this.biomes = buffer.readVarIntArray();
-            } else if (buffer.getVersionId() >= V_19W36A) {
-                this.biomes = buffer.readIntArray(1024);
-            }
+            biomeAccessor = new NoiseBiomeAccessor(buffer.readBiomeArray());
         }
 
         int size = buffer.readVarInt();
@@ -98,6 +96,11 @@ public class PacketChunkData extends ClientboundPacket {
 
         if (size > 0) {
             this.chunk = ChunkUtil.readChunkPacket(buffer, dimension, sectionBitMasks, 0, fullChunk, dimension.getHasSkyLight());
+            if (this.chunk != null) {
+                if (biomeAccessor != null) {
+                    this.chunk.setBiomeAccessor(biomeAccessor);
+                }
+            }
             // set position of the byte buffer, because of some reasons HyPixel makes some weird stuff and sends way to much 0 bytes. (~ 190k), thanks @pokechu22
             buffer.setPosition(size + lastPos);
         }
diff --git a/src/main/java/de/bixilon/minosoft/protocol/packets/clientbound/play/PacketMultiBlockChange.java b/src/main/java/de/bixilon/minosoft/protocol/packets/clientbound/play/PacketMultiBlockChange.java
index 581ea936e..6cba49c24 100644
--- a/src/main/java/de/bixilon/minosoft/protocol/packets/clientbound/play/PacketMultiBlockChange.java
+++ b/src/main/java/de/bixilon/minosoft/protocol/packets/clientbound/play/PacketMultiBlockChange.java
@@ -110,7 +110,7 @@ public class PacketMultiBlockChange extends ClientboundPacket {
 
         for (var sectionHeight : sectionHeights) {
             ChunkSection section = chunk.getSectionOrCreate(sectionHeight);
-            connection.getRenderer().getRenderWindow().getChunkRenderer().prepareChunkSection(getLocation(), sectionHeight, section);
+            connection.getRenderer().getRenderWindow().getChunkRenderer().prepareChunkSection(getLocation(), sectionHeight, section, chunk);
         }
     }
 
diff --git a/src/main/java/de/bixilon/minosoft/protocol/protocol/InByteBuffer.java b/src/main/java/de/bixilon/minosoft/protocol/protocol/InByteBuffer.java
index f8472b017..a84ed7f35 100644
--- a/src/main/java/de/bixilon/minosoft/protocol/protocol/InByteBuffer.java
+++ b/src/main/java/de/bixilon/minosoft/protocol/protocol/InByteBuffer.java
@@ -26,6 +26,7 @@ import de.bixilon.minosoft.data.entities.Poses;
 import de.bixilon.minosoft.data.inventory.Slot;
 import de.bixilon.minosoft.data.mappings.LegacyResourceLocation;
 import de.bixilon.minosoft.data.mappings.ResourceLocation;
+import de.bixilon.minosoft.data.mappings.biomes.Biome;
 import de.bixilon.minosoft.data.mappings.particle.Particle;
 import de.bixilon.minosoft.data.mappings.particle.data.BlockParticleData;
 import de.bixilon.minosoft.data.mappings.particle.data.DustParticleData;
@@ -397,6 +398,31 @@ public class InByteBuffer {
         return ret;
     }
 
+    public Biome[] readBiomeArray() {
+        int length = 0;
+        if (this.versionId >= V_20W28A) {
+            length = readVarInt();
+        } else if (this.versionId >= V_19W36A) {
+            length = 1024;
+        }
+        if (length > ProtocolDefinition.PROTOCOL_PACKET_MAX_SIZE) {
+            throw new IllegalArgumentException("Trying to allocate to much memory");
+        }
+
+        Biome[] ret = new Biome[length];
+        for (int i = 0; i < length; i++) {
+            int biomeId;
+
+            if (this.versionId >= V_20W28A) {
+                biomeId = readVarInt();
+            } else {
+                biomeId = readInt();
+            }
+            ret[i] = this.connection.getMapping().getBiomeRegistry().get(biomeId);
+        }
+        return ret;
+    }
+
     public long[] readLongArray(int length) {
         if (length > ProtocolDefinition.PROTOCOL_PACKET_MAX_SIZE) {
             throw new IllegalArgumentException("Trying to allocate to much memory");
diff --git a/src/main/java/de/bixilon/minosoft/util/ChunkUtil.java b/src/main/java/de/bixilon/minosoft/util/ChunkUtil.java
index 9bd4160ac..0c73eebc6 100644
--- a/src/main/java/de/bixilon/minosoft/util/ChunkUtil.java
+++ b/src/main/java/de/bixilon/minosoft/util/ChunkUtil.java
@@ -14,18 +14,21 @@
 package de.bixilon.minosoft.util;
 
 import de.bixilon.minosoft.data.mappings.Dimension;
+import de.bixilon.minosoft.data.mappings.biomes.Biome;
 import de.bixilon.minosoft.data.mappings.blocks.BlockState;
 import de.bixilon.minosoft.data.world.BlockInfo;
 import de.bixilon.minosoft.data.world.Chunk;
 import de.bixilon.minosoft.data.world.ChunkSection;
 import de.bixilon.minosoft.data.world.InChunkSectionLocation;
+import de.bixilon.minosoft.data.world.biome.BiomeAccessor;
+import de.bixilon.minosoft.data.world.biome.DummyBiomeAccessor;
+import de.bixilon.minosoft.data.world.biome.XZBiomeAccessor;
 import de.bixilon.minosoft.data.world.palette.Palette;
 import de.bixilon.minosoft.protocol.protocol.InByteBuffer;
 import de.bixilon.minosoft.protocol.protocol.ProtocolDefinition;
 
 import java.util.BitSet;
 import java.util.HashMap;
-import java.util.Map;
 
 import static de.bixilon.minosoft.protocol.protocol.ProtocolVersions.*;
 
@@ -91,10 +94,10 @@ public final class ChunkUtil {
                             }
                         }
                     }
-                    sectionMap.put(dimension.getLowestSection() + c, new ChunkSection(blockMap, Map.of())); // ToDo
+                    sectionMap.put(dimension.getLowestSection() + c, new ChunkSection(blockMap)); // ToDo
                 }
             }
-            return new Chunk(sectionMap);
+            return new Chunk(sectionMap, new DummyBiomeAccessor(buffer.getConnection().getMapping().getBiomeRegistry().get(0)));
         }
         if (buffer.getVersionId() < V_15W35A) { // ToDo: was this really changed in 62?
             byte sections = BitByte.getBitCount(sectionBitMasks[0]);
@@ -138,9 +141,9 @@ public final class ChunkUtil {
                         }
                     }
                 }
-                sectionMap.put(dimension.getLowestSection() + c, new ChunkSection(blockMap, Map.of()));
+                sectionMap.put(dimension.getLowestSection() + c, new ChunkSection(blockMap));
             }
-            return new Chunk(sectionMap);
+            return new Chunk(sectionMap, new DummyBiomeAccessor(buffer.getConnection().getMapping().getBiomeRegistry().get(0))); // ToDo
         }
         // really big thanks to: https://wiki.vg/index.php?title=Chunk_Format&oldid=13712
         HashMap<Integer, ChunkSection> sectionMap = new HashMap<>();
@@ -201,12 +204,17 @@ public final class ChunkUtil {
                 }
             }
 
-            sectionMap.put(dimension.getLowestSection() + c, new ChunkSection(blockMap, Map.of()));
+            sectionMap.put(dimension.getLowestSection() + c, new ChunkSection(blockMap));
         }
-        if (buffer.getVersionId() < V_19W36A) {
-            byte[] biomes = buffer.readBytes(256);
+        BiomeAccessor biomeAccessor = new DummyBiomeAccessor(buffer.getConnection().getMapping().getBiomeRegistry().get(0));
+        if (buffer.getVersionId() < V_19W36A && fullChunk) {
+            Biome[] biomes = new Biome[256];
+            for (int i = 0; i < biomes.length; i++) {
+                biomes[i] = buffer.getConnection().getMapping().getBiomeRegistry().get(buffer.readInt());
+            }
+            biomeAccessor = new XZBiomeAccessor(biomes);
         }
-        return new Chunk(sectionMap);
+        return new Chunk(sectionMap, biomeAccessor);
     }
 
     public static void readSkyLightPacket(InByteBuffer buffer, long[] skyLightMask, long[] blockLightMask, long[] emptyBlockLightMask, long[] emptySkyLightMask) {