This is a little pipeline I put together combining a few tutorials I could find here and there on the web. This is by no means comprehensive and in all likelihood, a little too specific. The video shows you how I was able to take a model created in ZBrush, export it into Cinema 4D, create usable UVs, and re-import that back into ZBrush.

Before you post a bunch of hate please recognize that I'm not any kind of pro at this stuff. This is in fact my first tutorial and I'm still very much in the learning stage of 3d modeling. my hope is that someone out there struggling to make sense of platform interoperability will find this useful, and then pass it on.

Good luck and let me know if this helps any of you. (less info)