UE4.16 the collision is invalid

Dear Sir or Madam

I am your user in China, here there are some problem need your help.

  1. In the video tutorial, the cloth (clothing) can’t achieve collision in 4.16, The clothes are interspersed with the body. There are no problem when we used the official model in UE4, but when we export the same file to MAYA, and then import into UE4 again, the collision is invalid.

2.We used physx to make clothing (apx ) in 4.15, there was no problem in MAYA. When we importing to UE4.15, the clothing is all misplaced. Please kindly let me know how to solve it?
We also importing the same file to 4.16,still without collision. How to solve it?

Best regards
Wuma Team