Thanks! I just found it a few minutes ago. It seems to like an Easter Egg- you really have to try right-clicking on all kinds of things. But, yes, a Right Click on the Camera icon itself- then Edit Object- brings up the "hidden" panel. It was what I was hoping for- some Photoshop-like color and gamma correction options. You can do nice "warm black and white" renders with this. Plus, the manual (which doesn't help you find this panel) does say that the image corrections are at a much higher level than the final saved file image... so- what I'm looking for now is- What is Vue 5's INTERNAL image depth? 64 bits? or even 96 bits? High-End HDRI is done at 96 bits.