Consensus is that the Rhino IO plugin for C4D is not worth bothering with. This is because it reads Rhino's display mesh, which is not very good for importing (no welded vertices, etc). It's fine for working in the Rhino viewport. Rhino itself can export OBJ files which are a lot better.

Hi Steve, so the main thing that the RhinoIO C4D plugin can do for someone is to bring over stuff that is not able to go into an OBJ file like lights and cameras.

So if someone has put in a bunch of effort setting up additional stuff like that in Rhino instead of waiting to do it in Cinema4D then that could be useful to have that stuff transferred over.

But yes just for transferring geometry only I can't see why you would want to do that.

MoI does not set up lights or cameras in it, so that aspect of the plugin won't be of any particular use for trying to use 3DM files to transfer mesh geometry from MoI into Cinema4D - that won't be gaining anything and will actually lose functionality, particularly n-gons.

- Michael