I tend to only create 3D objects, mostly vehicle/ship deck plans, not terrain (well seldom for terrain). I just need ways to depict some complex objects and capture shadowing for use in my 2D maps. I spent almost 10 years playing full 3D environments. That's not what I want, when I'm creating a map. 3D elements in the 2D composition if fine, but full 3D environments is not what I want to create.