Generate cryptomatte for ground shadow catcher layer? Tweet

[Yngvai]

I've got a basic scene with car and ground plane that acts as a shadow catcher layer. I noticed that when I export cryptomatte EXR, the car will be present in the object list but the ground plane will not.

Is it possible to generate a cryptomatte for a transparent shadow catcher object like a ground plane?

[J.C]

I've got a basic scene with car and ground plane that acts as a shadow catcher layer. I noticed that when I export cryptomatte EXR, the car will be present in the object list but the ground plane will not.

Is it possible to generate a cryptomatte for a transparent shadow catcher object like a ground plane?

You can use AOV to generate mask for this object or use a regular material for floor with neutral color and use it for shadow.