I often untick the “affect background” option in the colormapping rollout… for example if I want a completely white background when using vray physical camera. But this doesnt work when rendering with PPT… the background is darkened by the cameras exposure. Is this a bug, or is it meant to work this way?
It is meant to work in this way; this option does not work in ppt mode for the same reason that render elements do not. Hopefully both of these will be resolved in the future.