difference.glsl

vec3 blendDifference(vec3 base, vec3 blend) {
	return abs(base-blend);
}

vec3 blendDifference(vec3 base, vec3 blend, float opacity) {
	return (blendDifference(base, blend) * opacity + base * (1.0 - opacity));
}

#pragma glslify: export(blendDifference)