//These variables will get set automatically
texture rubyTexture;

sampler s0 = sampler_state { texture = <rubyTexture>; };


float4 DiffColourPass( in float2 Tex : TEXCOORD0 ) : COLOR0
{
	float4 color = 1-tex2D( s0, Tex.xy);
	return color;
}




Technique T0
{
    pass p0 { PixelShader = compile ps_2_0 DiffColourPass(); }
}

