Commenting post 428:
Yes, Blender cycles is considered, but that will soon be supported natively by the FreeCAD importer I'm working on. Of course, there will be tuts.
About the workflow with FreeCAD, it is indeed a very different application from its commercial counterparts, specially for an architect (people using for ex. solidworks have less difficulty, and children have no difficulty at all). But all long-time FreeCAD users will tell you that it's worth the effort...