half4 main () : COLOR0 {
	float2 lut[] = {
		float2(-1, 0.1),
		float2(0, 0.5),
		float2(1, 0.1)
	};
	half4 c = 0;
	for (int i = 0; i < 3; ++i)
		c.xy += lut[i];
	return c;
}