I created some buildings in Autodesk Revit program, exported them to FBX file, and imported the file into UE 4.7.1 but the buildings are messed up. I had to scale the buildings up 30 times. The buildings are hollow. How can I fix the problems?
Open them up in a proper 3d modeling software and fix them by hand. Revit produces quite messy results.
If they’re hollow, then they are probably hollow in Revit too, just that they have two sided materials going on so you can’t see it, which you can do in UE as well, in your materials.