Could you add support for Walt Disney’s ptex guys, it’s the future of UV mapping and would make Rocket/UE4 texture/material system revolutionary 
Hello David,
We appreciate the feature request. However, PTex is intended for higher end rendering and we do not expect to be able to integrate it into UE4.
-Adam
Ptex is for offline rendering and isn’t suitable for real time applications like games. Yes there are real time authoring tools, but they aren’t the same and they have very heavy overheads.
I could write up a hefty number of reasons as to why, but it looks like this blog post has a lot of points covered:
http://sebastiansylvan.com/2012/06/23/casting-a-critical-eye-on-gpu-ptex/