There is a nice little addin in the works from Emanuel Favreau … he is working on a Revit to Unity exporter that includes all materials and textures. You can open a sample model in WebGL here (probably should use Chrome).
There is obviously a lot of development in the industry at the moment to create the best experience in moving BIM models into gaming environments for various reasons, and there are a lot of solutions that are doing this in various ways. Typically, these offer real time rendering and visualization, and the side benefit of allowing models to be viewed in VR. Which method do you recommend?
Sample of Emanuel’s addin in action: