Hi thepeoplesrepublicofsound,
The project I got was not OK. Since I have not the original files, I had to set up all parts again. It was run by two rigs. Check the hands!
I have retargeted and reduced the set up to one rig that drives the Skin/Object.
Please place your textures inside the tex folder. Then open the project in Cinema 4D.
When this looks all good, save the file with a new name:
Main Menu> File> Save Project for Cineware
Start Unreal and follow the import procedure.
Check the unreal manual for more details.
For now, I want to see if that works.
Let me know how that worked on your side.
When you start something new, try first to get a simple small set up done, with few polygons, a single mesh, and one texture—just 30 frames or so.
When this works, do the next step. To start with such a long sequence and such a dense mesh, with many parts, is not the way I would suggest it.
BTW, I had zero textures of yours, I hope they are OK, and not the problem.
Cheers