Thanks Thebax2k for redirecting me to None the Wiser's work on the Good Games forum.
A 3-D Dungeon that is truly inspiring. None the Wiser's work is simply incredible.
How much fun would it be to run your players through that a 3-D adventure like that. I use a projector to project my maps onto our gaming table and this would make my efforts to render a 3-D space a worth while endeavor. (Particularly for recurring locales such as the PC's base of operations)
Additionally, Sketchup has the abilities to set up scenes (specifically saved 1st person perspectives) which would save a GM valuable game time. Thus saving a GM the trouble of maneuvering camera perspectives during play.