advanced rendering for AutoCAD
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I'm not offering any advice on which modelers to use. My guess is that after I've finished with this last round of displacement mapping most AutoCAD models, such as your building example, will work just fine. For the few that don't you may need to model the thing in a modeler that has a more sophisticated mesher (sketchup does not.)
Peter-- AutoCAD's new subdivision surfaces, probably what you're referring to by "meshes and nurbs surfaces" should work well.