I'm still having issues with this but I found a quick fix, however, another issue has come of it. I can export FBX from 3DC. UDK will still warn about smoothing groups, but it will except the mesh and it looks fine. My issue is that when I export an obj from Maya, with the 2 UV sets I have created, I export as an FBX from 3DC, open it back up in Maya and my 2UV sets are gone and replaced with 4 uv sets created in 3DC. What is the setting to stop this from happening? I don't tick anything upon export so I'm not sure whats going on. I'd appreciate any help:)