BB, when you refer to the 'gamma of the scene' I'm not  quite sure exactly what you mean. I'm trying to understand all this as I'm fascinated by it. And understanding it can only help to create better art.

In looking over some of my scenes in the mat room, I'm not finding any gamma references anywhere . I did a bit of exploring, and found you can add gamma to a color map through NEW NODE>MATH>GAMMA. Is this what you are referring to?

Still learning this stuff, so just point me in the right direction - no need to rewrite something you've already explained..

I did a bit of playing earlier with the gamma setting in the render setting. I'll post my results just for grins...

"I reject your reality and substitute my own" - Adam Savage