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anicg

How to get Volume self-shadows in Arnold?

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Posted (edited)

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

shadow_matte_polygonal_geometry_works.hiplcshadow_matte_polygonal_geometry_works.hiplc

floating.bgeo.sc

volume_not_ok_shadow_matte_material.jpg

volume_not_ok_shadow_matte_aov.jpg

polygon_ok.jpg

shadow_matte_volume_does_not_work.hiplc

shadow_matte_polygonal_geometry_works.hiplc

 

 

Edited by anicg

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