diff --git a/Substrate/SubstrateCS/Properties/AssemblyInfo.cs b/Substrate/SubstrateCS/Properties/AssemblyInfo.cs
index ef4b76e..943b028 100644
--- a/Substrate/SubstrateCS/Properties/AssemblyInfo.cs
+++ b/Substrate/SubstrateCS/Properties/AssemblyInfo.cs
@@ -29,5 +29,5 @@ using System.Runtime.InteropServices;
 //      Build Number
 //      Revision
 //
-[assembly: AssemblyVersion("0.5.2.0")]
-[assembly: AssemblyFileVersion("0.5.2.0")]
+[assembly: AssemblyVersion("0.5.3.0")]
+[assembly: AssemblyFileVersion("0.5.3.0")]
diff --git a/Substrate/SubstrateCS/Source/AlphaBlockCollection.cs b/Substrate/SubstrateCS/Source/AlphaBlockCollection.cs
index b01e333..e1b7cc5 100644
--- a/Substrate/SubstrateCS/Source/AlphaBlockCollection.cs
+++ b/Substrate/SubstrateCS/Source/AlphaBlockCollection.cs
@@ -199,20 +199,18 @@ namespace Substrate
                 }
             }
 
-            // Update height map
-
-            if (info1.ObscuresLight != info2.ObscuresLight) {
-                _lightManager.UpdateHeightMap(x, y, z);
-            }
-
             // Light consistency
 
             if (_autoLight) {
-                if (info1.Luminance != info2.Luminance || info1.Opacity != info2.Opacity) {
+                if (info1.ObscuresLight != info2.ObscuresLight) {
+                    _lightManager.UpdateHeightMap(x, y, z);
+                }
+
+                if (info1.Luminance != info2.Luminance || info1.Opacity != info2.Opacity || info1.TransmitsLight != info2.TransmitsLight) {
                     UpdateBlockLight(x, y, z);
                 }
 
-                if (info1.Opacity != info2.Opacity) {
+                if (info1.Opacity != info2.Opacity || info1.TransmitsLight != info2.TransmitsLight) {
                     UpdateSkyLight(x, y, z);
                 }
             }
diff --git a/Substrate/SubstrateCS/Source/BlockInfo.cs b/Substrate/SubstrateCS/Source/BlockInfo.cs
index 36038df..1dbde42 100644
--- a/Substrate/SubstrateCS/Source/BlockInfo.cs
+++ b/Substrate/SubstrateCS/Source/BlockInfo.cs
@@ -401,8 +401,8 @@ namespace Substrate
             Bedrock = new BlockInfo(7, "Bedrock");
             Water = new BlockInfo(8, "Water").SetOpacity(3).SetState(BlockState.FLUID);
             StationaryWater = new BlockInfo(9, "Stationary Water").SetOpacity(3).SetState(BlockState.FLUID);
-            Lava = new BlockInfo(10, "Lava").SetLuminance(MAX_LUMINANCE).SetState(BlockState.FLUID);
-            StationaryLava = new BlockInfo(11, "Stationary Lava").SetLuminance(MAX_LUMINANCE).SetState(BlockState.FLUID);
+            Lava = new BlockInfo(10, "Lava").SetOpacity(0).SetLuminance(MAX_LUMINANCE).SetState(BlockState.FLUID);
+            StationaryLava = new BlockInfo(11, "Stationary Lava").SetOpacity(0).SetLuminance(MAX_LUMINANCE).SetState(BlockState.FLUID);
             Sand = new BlockInfo(12, "Sand");
             Gravel = new BlockInfo(13, "Gravel");
             GoldOre = new BlockInfo(14, "Gold Ore");
diff --git a/Substrate/SubstrateCS/Source/Region.cs b/Substrate/SubstrateCS/Source/Region.cs
index 12ec2e7..2449faa 100644
--- a/Substrate/SubstrateCS/Source/Region.cs
+++ b/Substrate/SubstrateCS/Source/Region.cs
@@ -383,7 +383,7 @@ namespace Substrate
 
         public bool SaveChunk (Chunk chunk)
         {
-            Console.WriteLine("Region[{0}, {1}].Save({2}, {3})", _rx, _rz, ForeignX(chunk.X),ForeignZ(chunk.Z));
+            //Console.WriteLine("Region[{0}, {1}].Save({2}, {3})", _rx, _rz, ForeignX(chunk.X),ForeignZ(chunk.Z));
             return chunk.Save(GetChunkOutStream(ForeignX(chunk.X), ForeignZ(chunk.Z)));
         }