Questions about viewport display issues, cameras, lights, render settings and rendering issues should be posted here. Please specify in your post which render engine you are using, (Vray, Mental Ray, etc.).
This is a general forum for all questions and comments relating to Autodesk products not catered for in other forums. Questions about Impression, Maya, DWG TrueView, NavisWorks, Buzzsaw etc. are all fair game.
If your question/comment/observation doesn't seem to fit in any other category, it should probably be here. Maybe you have a query about a software application not listed above, there's bound to be someone here who's used it.