Hello,

Is there a way to specify which objects get alpha channels and which do not? For example: Let's say I have a blue sphere and a red square in a scene. I want to render the blue sphere by itself with an alpha, but still want to have the reflection from the red square present in the sphere's reflection. How can I hide the square from rendering, while still allowing it's color to affect the look of the sphere?

The reason for all of this is I want to do some post compositing on my film in After Effects to have more control over the look of a scene as far as levels, motion blur and depth of field.

Any suggestions? Thanks.

Chuck