Howdy blender friends,
This is a followup on an earlier conversation about how shadow passes work in Blender. Attached is a new blend that tries to understand shadow passes better. The attached images are of the SHADOW PASS that is produced via the compositor.
The center column’s material has “Receive” unchecked in the “Shadows” section of the material editor. And in the render (which is producing a shadow pass) you’ll see that there are still some shadows appearing on that column, similar to where the diffuse material would darken the material (the darkness is based on the normal direction in relation to the lamp, e.g.).
My understanding is that, with “Receive” unchecked, the center column should appear completely white, like this (modified in Photoshop):
In other words, it seems like it shouldn’t receive ANY shadows, even those cast by itself! What am I missing here?
EDIT: Forgot to attach the blend; here it is: shadowPass2.blend (458 KB)