Hi! There’s many topic about it, but I’ve never find any good (fast, reliable, easy) solutions.
How can I generate mask only for environment (world shader)?
Cryptomatte doesn’t store world shader; it’s not possible to make ID pass on object nor material. Environment pass is not a black and white maks, it’s color environment with everything else black. Making render with transparency and adding later environment pass is not good, because of anti aliasing problems with merging those two separate layers. I’ve also tried to make custom AOV but it’s always black.