diff --git a/ClassicalSharp/2D/Screens/Bindings/KeyBindingsScreen.cs b/ClassicalSharp/2D/Screens/Bindings/KeyBindingsScreen.cs
index a8a4cc3c9..754fc81e5 100644
--- a/ClassicalSharp/2D/Screens/Bindings/KeyBindingsScreen.cs
+++ b/ClassicalSharp/2D/Screens/Bindings/KeyBindingsScreen.cs
@@ -77,7 +77,7 @@ namespace ClassicalSharp {
 				}
 				curWidget = null;
 			}
-			return true;
+			return key < Key.F1 || key > Key.F35;
 		}
 		
 		public override void Dispose() {
diff --git a/ClassicalSharp/2D/Screens/Menu/GenLevelScreen.cs b/ClassicalSharp/2D/Screens/Menu/GenLevelScreen.cs
index f20e918cb..45d4872f2 100644
--- a/ClassicalSharp/2D/Screens/Menu/GenLevelScreen.cs
+++ b/ClassicalSharp/2D/Screens/Menu/GenLevelScreen.cs
@@ -42,7 +42,7 @@ namespace ClassicalSharp {
 				game.SetNewScreen( null );
 				return true;
 			}
-			return selectedWidget == null ? true :
+			return selectedWidget == null ? (key < Key.F1 || key > Key.F35) :
 				selectedWidget.HandlesKeyDown( key );
 		}
 		
diff --git a/ClassicalSharp/2D/Screens/Menu/MenuInputScreen.cs b/ClassicalSharp/2D/Screens/Menu/MenuInputScreen.cs
index 0490cecd4..e601bb3b8 100644
--- a/ClassicalSharp/2D/Screens/Menu/MenuInputScreen.cs
+++ b/ClassicalSharp/2D/Screens/Menu/MenuInputScreen.cs
@@ -45,7 +45,8 @@ namespace ClassicalSharp {
 				ChangeSetting();
 				return true;
 			}
-			if( inputWidget == null ) return true;
+			if( inputWidget == null ) 
+				return key < Key.F1 || key > Key.F35;
 			return inputWidget.HandlesKeyDown( key );
 		}
 		
diff --git a/ClassicalSharp/2D/Screens/Menu/PauseScreen.cs b/ClassicalSharp/2D/Screens/Menu/PauseScreen.cs
index 5ff10869e..caff877da 100644
--- a/ClassicalSharp/2D/Screens/Menu/PauseScreen.cs
+++ b/ClassicalSharp/2D/Screens/Menu/PauseScreen.cs
@@ -80,7 +80,7 @@ namespace ClassicalSharp {
 		public override bool HandlesKeyDown( Key key ) {
 			if( key == Key.Escape )
 				game.SetNewScreen( null );
-			return true;
+			return key < Key.F1 || key > Key.F35;
 		}
 		
 		public override void Dispose() {
diff --git a/ClassicalSharp/2D/Widgets/Menu/MenuInputWidget.cs b/ClassicalSharp/2D/Widgets/Menu/MenuInputWidget.cs
index e225843b7..2f36f06ae 100644
--- a/ClassicalSharp/2D/Widgets/Menu/MenuInputWidget.cs
+++ b/ClassicalSharp/2D/Widgets/Menu/MenuInputWidget.cs
@@ -135,7 +135,7 @@ namespace ClassicalSharp {
 				graphicsApi.DeleteTexture( ref chatInputTexture );
 				SetText( chatInputText.ToString() );
 			}
-			return true;
+			return key < Key.F1 || key > Key.F35;
 		}
 		
 		public override bool HandlesKeyUp( Key key ) {
diff --git a/ClassicalSharp/Entities/Entity.cs b/ClassicalSharp/Entities/Entity.cs
index 8f6da6466..7885460c0 100644
--- a/ClassicalSharp/Entities/Entity.cs
+++ b/ClassicalSharp/Entities/Entity.cs
@@ -91,13 +91,12 @@ namespace ClassicalSharp {
 			{
 				if( !game.Map.IsValidPos( x, y, z ) ) continue;
 				byte block = game.Map.GetBlock( x, y, z );
+				Vector3 min = new Vector3( x, y, z ) + info.MinBB[block];
+				Vector3 max = new Vector3( x, y, z ) + info.MaxBB[block];
 				
-				if( condition( block ) ) {
-					Vector3 min = new Vector3( x, y, z ) + info.MinBB[block];
-					Vector3 max = new Vector3( x, y, z ) + info.MaxBB[block];
-					BoundingBox blockBB = new BoundingBox( min, max );
-					if( blockBB.Intersects( bounds ) ) return true;
-				}
+				BoundingBox blockBB = new BoundingBox( min, max );
+				if( !blockBB.Intersects( bounds ) ) continue;		
+				if( condition( block ) ) return true;
 			}
 			return false;
 		}
diff --git a/ClassicalSharp/Map/ChunkMeshBuilder.cs b/ClassicalSharp/Map/ChunkMeshBuilder.cs
index 2e8d19386..9670df3ca 100644
--- a/ClassicalSharp/Map/ChunkMeshBuilder.cs
+++ b/ClassicalSharp/Map/ChunkMeshBuilder.cs
@@ -137,6 +137,7 @@ namespace ClassicalSharp {
 			x1 = x + min.X; y1 = y + min.Y; z1 = z + min.Z;
 			x2 = x + max.X; y2 = y + max.Y; z2 = z + max.Z;
 			this.minBB = min; this.maxBB = max;
+			minBB.Y = 1 - minBB.Y; maxBB.Y = 1 - maxBB.Y;
 			
 			fullBright = info.FullBright[tile];
 			isTranslucent = info.IsTranslucent[tile];
diff --git a/ClassicalSharp/Map/ChunkMeshBuilderTex2Col4.cs b/ClassicalSharp/Map/ChunkMeshBuilderTex2Col4.cs
index 5e981e544..22e665884 100644
--- a/ClassicalSharp/Map/ChunkMeshBuilderTex2Col4.cs
+++ b/ClassicalSharp/Map/ChunkMeshBuilderTex2Col4.cs
@@ -168,8 +168,8 @@ namespace ClassicalSharp {
 			int offset = (lightFlags >> TileSide.Left) & 1;
 			
 			float u1 = minBB.Z, u2 = (count - 1) + maxBB.Z * 15.99f/16f;
-			float v1 = vOrigin + minBB.Y * invVerElementSize;
-			float v2 = vOrigin + maxBB.Y * invVerElementSize * 15.99f/16f;
+			float v1 = vOrigin + maxBB.Y * invVerElementSize;
+			float v2 = vOrigin + minBB.Y * invVerElementSize * 15.99f/16f;
 			DrawInfo part = isTranslucent ? drawInfoTranslucent[i] : drawInfoNormal[i];
 			FastColour col = fullBright ? FastColour.White :
 				X >= offset ? (Y > map.heightmap[(Z * width) + (X - offset)] ? map.SunlightXSide : map.ShadowlightXSide) : map.SunlightXSide;
@@ -187,8 +187,8 @@ namespace ClassicalSharp {
 			int offset = (lightFlags >> TileSide.Right) & 1;
 			
 			float u1 = minBB.Z, u2 = (count - 1) + maxBB.Z * 15.99f/16f;
-			float v1 = vOrigin + minBB.Y * invVerElementSize;
-			float v2 = vOrigin + maxBB.Y * invVerElementSize * 15.99f/16f;	
+			float v1 = vOrigin + maxBB.Y * invVerElementSize;
+			float v2 = vOrigin + minBB.Y * invVerElementSize * 15.99f/16f;	
 			DrawInfo part = isTranslucent ? drawInfoTranslucent[i] : drawInfoNormal[i];
 			FastColour col = fullBright ? FastColour.White :
 				X <= (maxX - offset) ? (Y > map.heightmap[(Z * width) + (X + offset)] ? map.SunlightXSide : map.ShadowlightXSide) : map.SunlightXSide;
@@ -206,8 +206,8 @@ namespace ClassicalSharp {
 			int offset = (lightFlags >> TileSide.Front) & 1;
 			
 			float u1 = minBB.X, u2 = (count - 1) + maxBB.X * 15.99f/16f;
-			float v1 = vOrigin + minBB.Y * invVerElementSize;
-			float v2 = vOrigin + maxBB.Y * invVerElementSize * 15.99f/16f;
+			float v1 = vOrigin + maxBB.Y * invVerElementSize;
+			float v2 = vOrigin + minBB.Y * invVerElementSize * 15.99f/16f;
 			DrawInfo part = isTranslucent ? drawInfoTranslucent[i] : drawInfoNormal[i];
 			FastColour col = fullBright ? FastColour.White :
 				Z >= offset ? (Y > map.heightmap[((Z - offset) * width) + X] ? map.SunlightZSide : map.ShadowlightZSide) : map.SunlightZSide;
@@ -225,8 +225,8 @@ namespace ClassicalSharp {
 			int offset = (lightFlags >> TileSide.Back) & 1;
 			
 			float u1 = minBB.X, u2 = (count - 1) + maxBB.X * 15.99f/16f;
-			float v1 = vOrigin + minBB.Y * invVerElementSize;
-			float v2 = vOrigin + maxBB.Y * invVerElementSize * 15.99f/16f;	
+			float v1 = vOrigin + maxBB.Y * invVerElementSize;
+			float v2 = vOrigin + minBB.Y * invVerElementSize * 15.99f/16f;	
 			DrawInfo part = isTranslucent ? drawInfoTranslucent[i] : drawInfoNormal[i];
 			FastColour col = fullBright ? FastColour.White :
 				Z <= (maxZ - offset) ? (Y > map.heightmap[((Z + offset) * width) + X] ? map.SunlightZSide : map.ShadowlightZSide) : map.SunlightZSide;