Appendix A: How RAYZ Computes Luminance Values

Many RAYZ nodes can create luminance channels for various operations, with the option of selecting Film, NTSC or PAL luminance. Here is how each type of luminance is computed in RAYZ:

Film

RAYZ computes the film luminance value as follows:

red channel * 0.333 +

green channel * 0.333 +

blue channel * 0.333

NTSC Video

RAYZ computes the NTSC luminance value as follows:

red channel * 0.299 +

green channel * 0.587 +

blue channel * 0.114

PAL Video

RAYZ computes the PAL luminance value as follows:

red channel * 0.2125 +

green channel * 0.7154 +

blue channel * 0.0721