Hi All, I'm trying to combine two textures in HLSL - specifically, I want to take the alpha values from a base image, and the color data from an overlay image. My pixel shader for this looks like this: float4 PixelShaderFunction(VertexOut input) : COLOR0 { float4 baseColor = tex2D( BaseSampler, input.baseCoords.xy ).rgba; float4 overlayColor = tex2D( OverlaySampler, input.overlayCoords.xy ).rgba; float4 color; color.r = overlayColor.r; color.g = overlayColor.g; color.b = overlayColor.b; color.a = baseColor.a; return color.rgba; } and my blend state looks like this: BlendState bs = new BlendState(); bs.AlphaSourceBlend = Blend.SourceAlpha; bs.AlphaDestinationBlend = Blend.DestinationAlpha; bs.ColorSourceBlend = Blend.SourceColor; bs.ColorDestinationBlend = Blend.DestinationColor; What this leaves me with is a washed out version of what should be the overlay color. I've tried numerous permutations of the BlendState settings, and played with the pixel shader math quite a bit, but to no avail. Can anyone point me in the right direction? Thanks in advance =)