Just a heads up we've been busy at LightUp HQ bringing LightUp's unique realtime lighting and rendering solution to other CAD packages.
LightUp for Revit allows realtime navigation of your Revit models with Ambient Occlusion, realtime sun, IES lights and reflections. You can export luca files of your model along with any Views you have as well as generate ultra high resolution Still images.
We're aiming for a Q4 release. More info and screenshots later.