You'll need to apply an output shader and modify the alpha channel transparency to your liking. An output shader is a shader which executes after rendering has completed and is given the opportunity to perform an operation on the rendered image before it is dumped to file (or to screen in this case).
However, doing so may make mental ray freak out a bit and make it try to compensate by renormalizing the image effectively undoing the effect. Therefore you might have to visit your region render options and set image clipping to none. This will tell mental ray not to try to rebalance the image data. Matt From: [email protected] [mailto:[email protected]] On Behalf Of Ponthieux, Joseph G. (LARC-E1A)[LITES] Sent: Monday, May 13, 2013 7:35 AM To: [email protected] Subject: render region opacity? Is there any way to make the render region non-opaque? I'd like the render region to partially reveal the wireframes and scene underneath and it would be really useful if I could control the visibility(transparency?) of the region. Is that possible? -- Joey Ponthieux LaRC Information Technology Enhanced Services (LITES) Mymic Technical Services NASA Langley Research Center __________________________________________________ Opinions stated here-in are strictly those of the author and do not represent the opinions of NASA or any other party.
