Lut, Shader, Programming, Blender3d, Unreal Engine.
of the two, you calculate your U. First lets start with the Blues. Calculation of the Blue contribution: LUT is a 3D cube. As a matter of fact you can have your LUT as a 3D texture. But our layout is not like that. We have sliced the cube in N cuts, and layed them out side by side. So the first