I have attached files.
I just can't get any self-shadows on volume. I've rendered the shadow matte testing on a polygonal geometry and it works like a charm, but for the volume (in this case a cloud) I can't get anything at all, using both:
- just shadow matte AOV
- duplicated volume with shadow matte material
Everything works fine for polygons, nothing whatsoever works for volumes when it comes to shadow matte / pass.
Am I doing something wrong? I need the self shadows of the volume.
The volume (cloud) is from Disney: https://www.disneyanimation.com/data-sets/?drawer=/resources/clouds/
And here are the houdini hip files
