I see in a lot of professional HDR files there is a file for the lighting, a file for the reflections, and a file for the background. Now, backgrounds can be backplates, that's easy, but what about the different lighting and reflection HDR files in one render? Can KS do this?
The goal of KeyShot is to keep things simple. But you have region rendering for example to help with these kind of tasks. In KeyShot 4, we will have better ways of doing this.