11-22-2002, 01:42 AM
I assume you talk of PhotoRealistic RenderMan + MTOR as there's no renderer called 'RenderMan'. This is the name of an API.
Ensure that the image contains an alpha (select "rgba" in the display options) and use a compositing app (e.g. Photoshop) to put a solid color behind your objects.
The other option is to use one of the only two built-in imager shaders, PRMan knows.
Create a RIBBox appearance in SLIM and name it "frame" (without the quotes). Edit the 'Box of RIB' and enter
Imager "background" "color background" [1 0 0]
Or enable the backplane option that puts a bilinear patch at the far clipping plane. You can assign a constant shader to this patch again by using a RIBBox apperance named "backplane" (again without the quotes).
Again, edit the 'Box of RIB' and enter
Color 1 0 0
Note that both latter approaches will set your alpha channel to 1 (full opaque)! The color [1 0 0 ] means pure read, this is an RGB triple, replace with your favorite one. ;)
01-13-2006, 06:00 AM
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