Hi, after a few hours of search I still did not find the answer so I hope this is a valid question.
Hair (alpha channel texture on planes) casts good shadows on the skull (skin) but those shadows do not get cast if the shadow has to pass through another transparent surface ( another hair panel).
See the problem at
The mesh can be seen at
The eyebrows are textured onto a mesh just above the skin and when the long thin hair casts a shadow on the eyebrow mesh, that shadow dissapears. I want it to fall through the eyebrow mesh and show up on the skin mesh. You can see the shadow reappear below the eyebrows where the eyebrow mesh stops. The same problem appears at the top of the head where one hair panel blocks the shadow of a panel above it. This is actually more serious since I can just make the hair not pass over the eyebrows, but at top of head, it will look bad.
How do I get the shadow of the long hair to pass through a alpha channel of another surface and fall on a third opaque surface?
The shadow light is a spot light with Ray Shadow.
The eyebrow mesh texture is ztransp