diff --git a/Blarg.GameFramework/Blarg.GameFramework.csproj b/Blarg.GameFramework/Blarg.GameFramework.csproj
index 9125a1e..6f8b7d7 100644
--- a/Blarg.GameFramework/Blarg.GameFramework.csproj
+++ b/Blarg.GameFramework/Blarg.GameFramework.csproj
@@ -210,6 +210,7 @@
     <Compile Include="TileMap\Lighting\BaseTileMapLighter.cs" />
     <Compile Include="TileMap\Lighting\SimpleTileMapLighter.cs" />
     <Compile Include="TileMap\Lighting\LitChunkVertexGenerator.cs" />
+    <Compile Include="TileMap\Lighting\LightSpreadingTileMapLighter.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildExtensionsPath32)\Microsoft\Portable\$(TargetFrameworkVersion)\Microsoft.Portable.CSharp.targets" />
   <ItemGroup>
diff --git a/Blarg.GameFramework/TileMap/Lighting/LightSpreadingTileMapLighter.cs b/Blarg.GameFramework/TileMap/Lighting/LightSpreadingTileMapLighter.cs
new file mode 100644
index 0000000..10a8f81
--- /dev/null
+++ b/Blarg.GameFramework/TileMap/Lighting/LightSpreadingTileMapLighter.cs
@@ -0,0 +1,176 @@
+using System;
+using Blarg.GameFramework.TileMap.Meshes;
+
+namespace Blarg.GameFramework.TileMap.Lighting
+{
+	public class LightSpreadingTileMapLighter : BaseTileMapLighter
+	{
+		bool _doSkyLight;
+		bool _doTileLight;
+
+		public LightSpreadingTileMapLighter(bool doSkyLight, bool doTileLight)
+		{
+			_doSkyLight = doSkyLight;
+			_doTileLight = doTileLight;
+		}
+
+		public LightSpreadingTileMapLighter()
+			: this(true, true)
+		{
+		}
+
+		private void spreadSkyLight(int x, int y, int z, Tile tile, byte light, TileMap tileMap)
+		{
+			if (light > 0)
+			{
+				tile.SkyLight = light;
+				--light;
+
+				var left = tileMap.GetSafe(x - 1, y, z);
+				var right = tileMap.GetSafe(x + 1, y, z);
+				var forward = tileMap.GetSafe(x, y, z - 1);
+				var backward = tileMap.GetSafe(x, y, z + 1);
+				var up = tileMap.GetSafe(x, y + 1, z);
+				var down = tileMap.GetSafe(x, y - 1, z);
+
+				if (left != null && (left.IsEmptySpace || !tileMap.TileMeshes.Get(left).IsOpaque(TileMesh.SIDE_RIGHT)) && left.SkyLight < light)
+				{
+					byte spreadLight = light;
+					if (!left.IsEmptySpace)
+						spreadLight = Tile.AdjustLightForTranslucency(spreadLight, tileMap.TileMeshes.Get(left).Translucency);
+					spreadSkyLight(x - 1, y, z, left, spreadLight, tileMap);
+				}
+				if (right != null && (right.IsEmptySpace || !tileMap.TileMeshes.Get(right).IsOpaque(TileMesh.SIDE_LEFT)) && right.SkyLight < light)
+				{
+					byte spreadLight = light;
+					if (!right.IsEmptySpace)
+						spreadLight = Tile.AdjustLightForTranslucency(spreadLight, tileMap.TileMeshes.Get(right).Translucency);
+					spreadSkyLight(x + 1, y, z, right, spreadLight, tileMap);
+				}
+				if (forward != null && (forward.IsEmptySpace || !tileMap.TileMeshes.Get(forward).IsOpaque(TileMesh.SIDE_BACK)) && forward.SkyLight < light)
+				{
+					byte spreadLight = light;
+					if (!forward.IsEmptySpace)
+						spreadLight = Tile.AdjustLightForTranslucency(spreadLight, tileMap.TileMeshes.Get(forward).Translucency);
+					spreadSkyLight(x, y, z - 1, forward, spreadLight, tileMap);
+				}
+				if (backward != null && (backward.IsEmptySpace || !tileMap.TileMeshes.Get(backward).IsOpaque(TileMesh.SIDE_FRONT)) && backward.SkyLight < light)
+				{
+					byte spreadLight = light;
+					if (!backward.IsEmptySpace)
+						spreadLight = Tile.AdjustLightForTranslucency(spreadLight, tileMap.TileMeshes.Get(backward).Translucency);
+					spreadSkyLight(x, y, z + 1, backward, spreadLight, tileMap);
+				}
+				if (up != null && (up.IsEmptySpace || !tileMap.TileMeshes.Get(up).IsOpaque(TileMesh.SIDE_BOTTOM)) && up.SkyLight < light)
+				{
+					byte spreadLight = light;
+					if (!up.IsEmptySpace)
+						spreadLight = Tile.AdjustLightForTranslucency(spreadLight, tileMap.TileMeshes.Get(up).Translucency);
+					spreadSkyLight(x, y + 1, z, up, spreadLight, tileMap);
+				}
+				if (down != null && (down.IsEmptySpace || !tileMap.TileMeshes.Get(down).IsOpaque(TileMesh.SIDE_TOP)) && down.SkyLight < light)
+				{
+					byte spreadLight = light;
+					if (!down.IsEmptySpace)
+						spreadLight = Tile.AdjustLightForTranslucency(spreadLight, tileMap.TileMeshes.Get(down).Translucency);
+					spreadSkyLight(x, y - 1, z, down, spreadLight, tileMap);
+				}
+			}
+		}
+
+		private void spreadTileLight(int x, int y, int z, Tile tile, byte light, TileMap tileMap)
+		{
+			if (light > 0)
+			{
+				tile.TileLight = light;
+				--light;
+
+				Tile left = tileMap.GetSafe(x - 1, y, z);
+				Tile right = tileMap.GetSafe(x + 1, y, z);
+				Tile forward = tileMap.GetSafe(x, y, z - 1);
+				Tile backward = tileMap.GetSafe(x, y, z + 1);
+				Tile up = tileMap.GetSafe(x, y + 1, z);
+				Tile down = tileMap.GetSafe(x, y - 1, z);
+
+				if (left != null && (left.IsEmptySpace || !tileMap.TileMeshes.Get(left).IsOpaque(TileMesh.SIDE_RIGHT)) && left.TileLight < light)
+				{
+					byte spreadLight = light;
+					if (!left.IsEmptySpace)
+						spreadLight = Tile.AdjustLightForTranslucency(spreadLight, tileMap.TileMeshes.Get(left).Translucency);
+					spreadTileLight(x - 1, y, z, left, spreadLight, tileMap);
+				}
+				if (right != null && (right.IsEmptySpace || !tileMap.TileMeshes.Get(right).IsOpaque(TileMesh.SIDE_LEFT)) && right.TileLight < light)
+				{
+					byte spreadLight = light;
+					if (!right.IsEmptySpace)
+						spreadLight = Tile.AdjustLightForTranslucency(spreadLight, tileMap.TileMeshes.Get(right).Translucency);
+					spreadTileLight(x + 1, y, z, right, spreadLight, tileMap);
+				}
+				if (forward != null && (forward.IsEmptySpace || !tileMap.TileMeshes.Get(forward).IsOpaque(TileMesh.SIDE_BACK)) && forward.TileLight < light)
+				{
+					byte spreadLight = light;
+					if (!forward.IsEmptySpace)
+						spreadLight = Tile.AdjustLightForTranslucency(spreadLight, tileMap.TileMeshes.Get(forward).Translucency);
+					spreadTileLight(x, y, z - 1, forward, spreadLight, tileMap);
+				}
+				if (backward != null && (backward.IsEmptySpace || !tileMap.TileMeshes.Get(backward).IsOpaque(TileMesh.SIDE_FRONT)) && backward.TileLight < light)
+				{
+					byte spreadLight = light;
+					if (!backward.IsEmptySpace)
+						spreadLight = Tile.AdjustLightForTranslucency(spreadLight, tileMap.TileMeshes.Get(backward).Translucency);
+					spreadTileLight(x, y, z + 1, backward, spreadLight, tileMap);
+				}
+				if (up != null && (up.IsEmptySpace || !tileMap.TileMeshes.Get(up).IsOpaque(TileMesh.SIDE_BOTTOM)) && up.TileLight < light)
+				{
+					byte spreadLight = light;
+					if (!up.IsEmptySpace)
+						spreadLight = Tile.AdjustLightForTranslucency(spreadLight, tileMap.TileMeshes.Get(up).Translucency);
+					spreadTileLight(x, y + 1, z, up, spreadLight, tileMap);
+				}
+				if (down != null && (down.IsEmptySpace || !tileMap.TileMeshes.Get(down).IsOpaque(TileMesh.SIDE_TOP)) && down.TileLight < light)
+				{
+					byte spreadLight = light;
+					if (!down.IsEmptySpace)
+						spreadLight = Tile.AdjustLightForTranslucency(spreadLight, tileMap.TileMeshes.Get(down).Translucency);
+					spreadTileLight(x, y - 1, z, down, spreadLight, tileMap);
+				}
+			}
+		}
+
+		public override void Light(TileMap tileMap)
+		{
+			ResetLightValues(tileMap);
+
+			if (_doSkyLight)
+				CastSkyLightDown(tileMap);
+
+			// for each light source (sky or not), recursively go through and set
+			// appropriate lighting for each adjacent tile
+			for (int y = 0; y < tileMap.Height; ++y)
+			{
+				for (int z = 0; z < tileMap.Depth; ++z)
+				{
+					for (int x = 0; x < tileMap.Width; ++x)
+					{
+						Tile tile = tileMap.Get(x, y, z);
+						if (tile.IsEmptySpace)
+						{
+							if (_doSkyLight && tile.IsSkyLit)
+								spreadSkyLight(x, y, z, tile, tile.SkyLight, tileMap);
+						}
+						else
+						{
+							if (_doTileLight)
+							{
+								TileMesh mesh = tileMap.TileMeshes.Get(tile);
+								if (mesh.IsLightSource)
+									spreadTileLight(x, y, z, tile, mesh.LightValue, tileMap);
+							}
+						}
+					}
+				}
+			}
+		}
+	}
+}
+