I got a link to an interesting 3D rendering software package the other day. Its called Hypershot. Its a true on-the-fly HDRI rendering package.
Tried it out with pretty good results. Its a touch slow on my machine (they recommend Quad Core).
I am not convinced its worth the price tag they’re asking for, but its worth a look.
If you use Rhino, for speed, simplicity and “pretty damn good” real time renderings AuxPecker I tend to think is more appropriate (not to mention, free):