diff --git a/src/main/java/de/bixilon/minosoft/data/world/container/block/SectionOcclusion.kt b/src/main/java/de/bixilon/minosoft/data/world/container/block/SectionOcclusion.kt
index 7d096dfeb..828dc4ba3 100644
--- a/src/main/java/de/bixilon/minosoft/data/world/container/block/SectionOcclusion.kt
+++ b/src/main/java/de/bixilon/minosoft/data/world/container/block/SectionOcclusion.kt
@@ -77,6 +77,7 @@ class SectionOcclusion(
         return false
     }
 
+    private fun trace(regions: ShortArray, position: InSectionPosition) = trace(regions, position, position.index.toShort())
     private fun trace(regions: ShortArray, position: InSectionPosition, region: Short) {
         if (regions.setIfUnset(position, region)) return
 
@@ -92,11 +93,18 @@ class SectionOcclusion(
         // mark regions and check direct neighbours
         Arrays.fill(array, EMPTY_REGION)
 
-        // TODO: Only start flood filling from sides (don't trace potential irrelevant regions in the middle)
-        // TODO: Keep track of direction and never go into negative again (we can't change the direction of the look; it can not refelct here)
+        // TODO: Keep track of direction and never go into negative again (we can't change the direction of the look; it can not reflect here)
 
-        for (index in 0 until ProtocolDefinition.BLOCKS_PER_SECTION) {
-            trace(array, InSectionPosition(index), index.toShort())
+
+        for (index in 0 until 256) {
+            trace(array, InSectionPosition((index shr 0) and 0x0F, 0x00, (index shr 4) and 0x0F))
+            trace(array, InSectionPosition((index shr 0) and 0x0F, 0x0F, (index shr 4) and 0x0F))
+
+            trace(array, InSectionPosition((index shr 0) and 0x0F, (index shr 4) and 0x0F, 0x00))
+            trace(array, InSectionPosition((index shr 0) and 0x0F, (index shr 4) and 0x0F, 0x0F))
+
+            trace(array, InSectionPosition(0x00, (index shr 4) and 0x0F, (index shr 0) and 0x0F))
+            trace(array, InSectionPosition(0x0F, (index shr 4) and 0x0F, (index shr 0) and 0x0F))
         }
 
         return array
diff --git a/src/main/java/de/bixilon/minosoft/data/world/vec/SVec3.kt b/src/main/java/de/bixilon/minosoft/data/world/vec/SVec3.kt
index 6646687ff..589bfcb79 100644
--- a/src/main/java/de/bixilon/minosoft/data/world/vec/SVec3.kt
+++ b/src/main/java/de/bixilon/minosoft/data/world/vec/SVec3.kt
@@ -30,8 +30,6 @@ value class SVec3(val raw: Int) {
         assertVec(z, -MAX_Z, MAX_Z)
     }
 
-    constructor(vector: DirectionVector) : this(vector.x, vector.y, vector.z)
-
 
     inline val x: Int get() = (((raw ushr SHIFT_X) and MASK_X) shl (Int.SIZE_BITS - BITS_X)) shr (Int.SIZE_BITS - BITS_X)
     inline val y: Int get() = (((raw ushr SHIFT_Y) and MASK_Y) shl (Int.SIZE_BITS - BITS_Y)) shr (Int.SIZE_BITS - BITS_Y)
@@ -131,5 +129,8 @@ value class SVec3(val raw: Int) {
 
 
         val EMPTY = SVec3(0, 0, 0)
+
+
+        operator fun invoke(vector: DirectionVector) = SVec3(vector.x, vector.y, vector.z)
     }
 }