For 3D files, you can import FBX, OBJ, 3DS, glTF, GLB, DAE, STL, and SKP. You can also upload 2D images (JPG or PNG).
At the moment, you can export any Space as an FBX, DAE, or OBJ file.
Our Revit Add-In creates a Space out of any 3D View in your Revit file, that is easy to update at any time. You can learn more about it and download the add-in here.