Cinema 4D Bridge
If you, like many other Cinema 4D users use an external application for your UV mapping needs, you may already be familiar with the RizomUV workflow. You’ll probably also be a little fed up with the whole Model – > Export ->UV unwrap->Export->Import workflow.
Arsen Chachanidze simplified this for you by creating a bridge which transfers UVs from C4D to RizomUV and vice versa. The current bridge supports C4D R19, but it does work for many users in 20 as well