Puzzlematte

Puzzle Matte is a type of AOV (Arbitrary Output Variable) used in Redshift that allows you to isolate specific objects, materials, or groups in your render by assigning them to the red, green, or blue channels. This makes it easy to create masks for compositing and post-processing without needing multiple render passes.This pass has an advantage over Cryptomatte because it can also look at refractions and reflections of the isolated object or material which Cryptomattes can't. This is specifically important if you need to change a color in post and said color is also seen in reflections on other objects or if the object is behind glass for example.