Hi Leonard, actually Cinema4D is normally able to handle n-gons quite well, so I'd suggest using Output:n-gons first since that will make a nicer looking wireframe.

But I've mostly tested before with Cinema4D's default non-riptide OBJ importer.

If you run into any problems where it seems like an n-gon is not being handled properly, then you may need to switch to Output: Quads & Triangles for that model instead.

- Michael