Any common reason why Render Elements will all render BLACK?
I think maybe the problem was I clicked the render off, before rendering the samples...not sure.
All render elements, or just some? Sometimes there may be no obvious/visible data for a particular element, for example motion vector output when the camera is not moving, or a depth pass with a very distant terrain with no foreground bits (will probably be all black unless you remap the values to visible scale).
- Oshyan