diff --git a/src/integration-test/kotlin/de/bixilon/minosoft/data/world/chunk/light/LightTestUtil.kt b/src/integration-test/kotlin/de/bixilon/minosoft/data/world/chunk/light/LightTestUtil.kt
index 7da58f5db..dc84a2a45 100644
--- a/src/integration-test/kotlin/de/bixilon/minosoft/data/world/chunk/light/LightTestUtil.kt
+++ b/src/integration-test/kotlin/de/bixilon/minosoft/data/world/chunk/light/LightTestUtil.kt
@@ -14,6 +14,7 @@
 package de.bixilon.minosoft.data.world.chunk.light
 
 import de.bixilon.kotlinglm.vec3.Vec3i
+import de.bixilon.kutil.primitive.IntUtil.toHex
 import de.bixilon.minosoft.data.world.World
 import de.bixilon.minosoft.data.world.chunk.Chunk
 import org.testng.Assert
@@ -22,11 +23,11 @@ object LightTestUtil {
 
     fun Chunk.assertLight(x: Int, y: Int, z: Int, expected: Int) {
         val light = this.light[x, y, z] and 0xFF
-        Assert.assertEquals(light, expected)
+        Assert.assertEquals(light.toHex(2), expected.toHex(2))
     }
 
     fun World.assertLight(x: Int, y: Int, z: Int, expected: Int) {
         val light = this.getLight(Vec3i(x, y, z)) and 0xFF
-        Assert.assertEquals(light, expected)
+        Assert.assertEquals(light.toHex(2), expected.toHex(2))
     }
 }
diff --git a/src/integration-test/kotlin/de/bixilon/minosoft/data/world/chunk/light/breaking/block/BlockLightBreakIT.kt b/src/integration-test/kotlin/de/bixilon/minosoft/data/world/chunk/light/breaking/block/BlockLightBreakIT.kt
index d08ce36e2..727c8d5e7 100644
--- a/src/integration-test/kotlin/de/bixilon/minosoft/data/world/chunk/light/breaking/block/BlockLightBreakIT.kt
+++ b/src/integration-test/kotlin/de/bixilon/minosoft/data/world/chunk/light/breaking/block/BlockLightBreakIT.kt
@@ -140,28 +140,28 @@ class BlockLightBreakIT {
         val world = ConnectionTestUtil.createConnection(3).world
         world[Vec3i(12, 20, 12)] = TorchTest0.state
         world[Vec3i(12, 20, 12)] = null
-        world.assertLight(-1, 33, 12, 0xF0)
+        world.assertLight(-1, 20, 12, 0xF0)
     }
 
     fun totalPropagation4() {
         val world = ConnectionTestUtil.createConnection(3).world
         world[Vec3i(12, 20, 12)] = TorchTest0.state
         world[Vec3i(12, 20, 12)] = null
-        world.assertLight(25, 33, 12, 0xF0)
+        world.assertLight(25, 20, 12, 0xF0)
     }
 
     fun totalPropagation5() {
         val world = ConnectionTestUtil.createConnection(3).world
         world[Vec3i(12, 20, 12)] = TorchTest0.state
         world[Vec3i(12, 20, 12)] = null
-        world.assertLight(12, 33, 25, 0xF0)
+        world.assertLight(12, 20, 25, 0xF0)
     }
 
     fun totalPropagation6() {
         val world = ConnectionTestUtil.createConnection(3).world
         world[Vec3i(12, 20, 12)] = TorchTest0.state
         world[Vec3i(12, 20, 12)] = null
-        world.assertLight(12, 33, -1, 0xF0)
+        world.assertLight(12, 20, -1, 0xF0)
     }
 
     fun lightUpdate() {
diff --git a/src/integration-test/kotlin/de/bixilon/minosoft/data/world/chunk/light/place/block/BlockLightPlaceIT.kt b/src/integration-test/kotlin/de/bixilon/minosoft/data/world/chunk/light/place/block/BlockLightPlaceIT.kt
index fe424dafd..1f27df0b7 100644
--- a/src/integration-test/kotlin/de/bixilon/minosoft/data/world/chunk/light/place/block/BlockLightPlaceIT.kt
+++ b/src/integration-test/kotlin/de/bixilon/minosoft/data/world/chunk/light/place/block/BlockLightPlaceIT.kt
@@ -33,80 +33,80 @@ class BlockLightPlaceIT {
     fun inBlock() {
         val world = ConnectionTestUtil.createConnection(3).world
         world[Vec3i(8, 10, 8)] = TorchTest0.state
-        world.assertLight(8, 10, 8, 0xFD)
+        world.assertLight(8, 10, 8, 0xFE)
     }
 
     fun nextToBlock1() {
         val world = ConnectionTestUtil.createConnection(3).world
         world[Vec3i(8, 10, 8)] = TorchTest0.state
-        world.assertLight(8, 9, 8, 0xFC)
+        world.assertLight(8, 9, 8, 0xFD)
         world.assertLight(8, 0, 8, 0xF4)
     }
 
     fun nextToBlock2() {
         val world = ConnectionTestUtil.createConnection(3).world
         world[Vec3i(8, 10, 8)] = TorchTest0.state
-        world.assertLight(8, 11, 8, 0xFC)
+        world.assertLight(8, 11, 8, 0xFD)
     }
 
     fun nextToBlock3() {
         val world = ConnectionTestUtil.createConnection(3).world
         world[Vec3i(8, 10, 8)] = TorchTest0.state
-        world.assertLight(7, 10, 8, 0xFC)
+        world.assertLight(7, 10, 8, 0xFD)
     }
 
     fun nextToBlock4() {
         val world = ConnectionTestUtil.createConnection(3).world
         world[Vec3i(8, 10, 8)] = TorchTest0.state
-        world.assertLight(9, 10, 8, 0xFC)
+        world.assertLight(9, 10, 8, 0xFD)
     }
 
     fun nextToBlock5() {
         val world = ConnectionTestUtil.createConnection(3).world
         world[Vec3i(8, 10, 8)] = TorchTest0.state
-        world.assertLight(8, 10, 7, 0xFC)
+        world.assertLight(8, 10, 7, 0xFD)
     }
 
     fun nextToBlock6() {
         val world = ConnectionTestUtil.createConnection(3).world
         world[Vec3i(8, 10, 8)] = TorchTest0.state
-        world.assertLight(8, 10, 9, 0xFC)
+        world.assertLight(8, 10, 9, 0xFD)
     }
 
     fun nextNeighbour1() {
         val world = ConnectionTestUtil.createConnection(3).world
         world[Vec3i(16, 16, 16)] = TorchTest0.state
-        world.assertLight(16, 17, 16, 0xFC)
+        world.assertLight(16, 17, 16, 0xFD)
     }
 
     fun nextNeighbour2() {
         val world = ConnectionTestUtil.createConnection(3).world
         world[Vec3i(16, 16, 16)] = TorchTest0.state
-        world.assertLight(17, 16, 16, 0xFC)
+        world.assertLight(17, 16, 16, 0xFD)
     }
 
     fun nextNeighbour3() {
         val world = ConnectionTestUtil.createConnection(3).world
         world[Vec3i(16, 16, 16)] = TorchTest0.state
-        world.assertLight(16, 16, 17, 0xFC)
+        world.assertLight(16, 16, 17, 0xFD)
     }
 
     fun nextNeighbour4() {
         val world = ConnectionTestUtil.createConnection(3).world
         world[Vec3i(17, 17, 17)] = TorchTest0.state
-        world.assertLight(17, 16, 17, 0xFC)
+        world.assertLight(17, 16, 17, 0xFD)
     }
 
     fun nextNeighbour5() {
         val world = ConnectionTestUtil.createConnection(3).world
         world[Vec3i(17, 17, 17)] = TorchTest0.state
-        world.assertLight(16, 17, 17, 0xFC)
+        world.assertLight(16, 17, 17, 0xFD)
     }
 
     fun nextNeighbour6() {
         val world = ConnectionTestUtil.createConnection(3).world
         world[Vec3i(17, 17, 17)] = TorchTest0.state
-        world.assertLight(17, 17, 16, 0xFC)
+        world.assertLight(17, 17, 16, 0xFD)
     }
 
     fun totalPropagation1() {
@@ -124,25 +124,25 @@ class BlockLightPlaceIT {
     fun totalPropagation3() {
         val world = ConnectionTestUtil.createConnection(3).world
         world[Vec3i(12, 20, 12)] = TorchTest0.state
-        world.assertLight(-1, 33, 12, 0xF1)
+        world.assertLight(-1, 20, 12, 0xF1)
     }
 
     fun totalPropagation4() {
         val world = ConnectionTestUtil.createConnection(3).world
         world[Vec3i(12, 20, 12)] = TorchTest0.state
-        world.assertLight(25, 33, 12, 0xF1)
+        world.assertLight(25, 20, 12, 0xF1)
     }
 
     fun totalPropagation5() {
         val world = ConnectionTestUtil.createConnection(3).world
         world[Vec3i(12, 20, 12)] = TorchTest0.state
-        world.assertLight(12, 33, 25, 0xF1)
+        world.assertLight(12, 20, 25, 0xF1)
     }
 
     fun totalPropagation6() {
         val world = ConnectionTestUtil.createConnection(3).world
         world[Vec3i(12, 20, 12)] = TorchTest0.state
-        world.assertLight(12, 33, -1, 0xF1)
+        world.assertLight(12, 20, -1, 0xF1)
     }
 
     fun lightUpdate() {
@@ -171,8 +171,8 @@ class BlockLightPlaceIT {
         val world = ConnectionTestUtil.createConnection(3).world
         world[Vec3i(8, 0, 8)] = TorchTest0.state
         val chunk = world[Vec2i(0, 0)]!!
-        chunk.assertLight(8, -1, 8, 0xFC)
-        chunk.assertLight(9, -1, 8, 0xFB)
+        chunk.assertLight(8, -1, 8, 0xFD)
+        chunk.assertLight(9, -1, 8, 0xFC)
     }
 
 
@@ -180,8 +180,8 @@ class BlockLightPlaceIT {
         val world = ConnectionTestUtil.createConnection(3).world
         world[Vec3i(8, 255, 8)] = TorchTest0.state
         val chunk = world[Vec2i(0, 0)]!!
-        chunk.assertLight(8, 256, 8, 0xFC)
-        chunk.assertLight(9, 256, 8, 0xFB)
+        chunk.assertLight(8, 256, 8, 0xFD)
+        chunk.assertLight(9, 256, 8, 0xFC)
     }
 
     fun bottomPropagation() {
@@ -190,8 +190,8 @@ class BlockLightPlaceIT {
         world[Vec3i(8, 0, 8)] = TorchTest0.state
 
         val chunk = world[Vec2i(0, 0)]!!
-        chunk.assertLight(8, -1, 8, 0x0C)
-        chunk.assertLight(9, -1, 8, 0x0B)
+        chunk.assertLight(8, -1, 8, 0x0D)
+        chunk.assertLight(9, -1, 8, 0x0C)
 
         chunk.assertLight(+20, -1, +8, 0x01)
         chunk.assertLight(+8, -1, +8, 0x01)
@@ -205,8 +205,8 @@ class BlockLightPlaceIT {
         world[Vec3i(8, 255, 8)] = TorchTest0.state
 
         val chunk = world[Vec2i(0, 0)]!!
-        chunk.assertLight(8, 256, 8, 0xFC)
-        chunk.assertLight(9, 256, 8, 0xFB)
+        chunk.assertLight(8, 256, 8, 0xFD)
+        chunk.assertLight(9, 256, 8, 0xFC)
 
         chunk.assertLight(+20, 256, +8, 0xF1)
         chunk.assertLight(+8, 256, +8, 0xF1)
diff --git a/src/main/java/de/bixilon/minosoft/data/registries/dimension/DimensionProperties.kt b/src/main/java/de/bixilon/minosoft/data/registries/dimension/DimensionProperties.kt
index 81c839630..23915b904 100644
--- a/src/main/java/de/bixilon/minosoft/data/registries/dimension/DimensionProperties.kt
+++ b/src/main/java/de/bixilon/minosoft/data/registries/dimension/DimensionProperties.kt
@@ -45,7 +45,7 @@ data class DimensionProperties(
     val maxY = dataHeight + minY - 1
     val sections = dataHeight / ProtocolDefinition.SECTION_HEIGHT_Y
     val minSection = minY shr 4
-    val maxSection = minSection + sections
+    val maxSection = (minSection + sections - 1)
 
     val brightness = FloatArray(16)
 
diff --git a/src/main/java/de/bixilon/minosoft/util/chunk/ChunkUtil.kt b/src/main/java/de/bixilon/minosoft/util/chunk/ChunkUtil.kt
index d4527e365..74244099b 100644
--- a/src/main/java/de/bixilon/minosoft/util/chunk/ChunkUtil.kt
+++ b/src/main/java/de/bixilon/minosoft/util/chunk/ChunkUtil.kt
@@ -74,7 +74,7 @@ object ChunkUtil {
         // parse data
         var arrayPosition = 0
         val sectionBlocks: Array<BlockSectionDataProvider?> = arrayOfNulls(dimension.sections)
-        for ((sectionIndex, sectionHeight) in (dimension.minSection until dimension.maxSection).withIndex()) {
+        for ((sectionIndex, sectionHeight) in (dimension.minSection..dimension.maxSection).withIndex()) {
             if (!sectionBitMask[sectionIndex]) {
                 continue
             }
@@ -139,7 +139,7 @@ object ChunkUtil {
 
         var arrayPos = 0
         val sectionBlocks: Array<BlockSectionDataProvider?> = arrayOfNulls(dimension.sections)
-        for ((sectionIndex, sectionHeight) in (dimension.minSection until dimension.maxSection).withIndex()) { // max sections per chunks in chunk column
+        for ((sectionIndex, sectionHeight) in (dimension.minSection..dimension.maxSection).withIndex()) { // max sections per chunks in chunk column
             if (!sectionBitMask[sectionIndex]) {
                 continue
             }
@@ -162,7 +162,7 @@ object ChunkUtil {
         var lightReceived = 0
         val biomes: Array<Array<Biome?>?> = arrayOfNulls(dimension.sections)
 
-        for ((sectionIndex, sectionHeight) in (dimension.minSection until (sectionBitMask?.length() ?: dimension.maxSection)).withIndex()) { // max sections per chunks in chunk column
+        for ((sectionIndex, sectionHeight) in (dimension.minSection until (sectionBitMask?.length() ?: dimension.sections)).withIndex()) { // max sections per chunks in chunk column
             if (sectionBitMask?.get(sectionIndex) == false) {
                 continue
             }