Add a secondary texture coordinate to Vertex.

glsl/shp.frag

@@ -4,13 +4,14 @@ uniform bool EnableDepthPreview;
 uniform float DepthTextureScale;
 
 varying vec4 vTexCoord;
+varying vec2 vTexMetadata;
 varying vec4 vChannelMask;
 varying vec4 vDepthMask;
 
 void main()
 {
 	vec4 x = texture2D(DiffuseTexture, vTexCoord.st);
-	vec2 p = vec2(dot(x, vChannelMask), vTexCoord.p);
+	vec2 p = vec2(dot(x, vChannelMask), vTexMetadata.s);
 	vec4 c = texture2D(Palette, p);
 
 	// Discard any transparent fragments (both color and depth)

glsl/shp.vert

@@ -3,7 +3,9 @@ uniform vec3 r1, r2;
 
 attribute vec4 aVertexPosition;
 attribute vec4 aVertexTexCoord;
+attribute vec2 aVertexTexMetadata;
 varying vec4 vTexCoord;
+varying vec2 vTexMetadata;
 varying vec4 vChannelMask;
 varying vec4 vDepthMask;
 
@@ -38,6 +40,7 @@ void main()
 {
 	gl_Position = vec4((aVertexPosition.xyz - Scroll.xyz) * r1 + r2, 1);
 	vTexCoord = aVertexTexCoord;
-	vChannelMask = DecodeChannelMask(aVertexTexCoord.w);
-	vDepthMask = DecodeDepthChannelMask(aVertexTexCoord.w);
+	vTexMetadata = aVertexTexMetadata;
+	vChannelMask = DecodeChannelMask(aVertexTexMetadata.t);
+	vDepthMask = DecodeDepthChannelMask(aVertexTexMetadata.t);
 } 

glsl/vxl.vert

@@ -3,6 +3,7 @@ uniform mat4 TransformMatrix;
 
 attribute vec4 aVertexPosition;
 attribute vec4 aVertexTexCoord;
+attribute vec2 aVertexTexMetadata;
 varying vec4 vTexCoord;
 varying vec4 vChannelMask;
 varying vec4 vNormalsMask;
@@ -19,6 +20,6 @@ void main()
 {
 	gl_Position = View*TransformMatrix*aVertexPosition;
 	vTexCoord = aVertexTexCoord;
-	vChannelMask = DecodeMask(aVertexTexCoord.z);
-	vNormalsMask = DecodeMask(aVertexTexCoord.w);
+	vChannelMask = DecodeMask(aVertexTexMetadata.s);
+	vNormalsMask = DecodeMask(aVertexTexMetadata.t);
 }