Nice overview on D&M about what IrisVR is bringing to VR with their $8M round of funding. I didn't know about Iris Prospect
"Prospect offers support for Revit, Rhino, Sketchup, and OBJ models. There really is no limit on the model size as the product can handle complex assemblies. There is no limit on the number of files you can process, even with the free Basic version. Within the IrisVR Prospect environment, you get to experience life-like presentations with complex details. The conversion from model to VR is “in less time than it takes to print.”
Their learn section is helpful with set up and experience.