I tried blender with apex, and while eventually I could export a simple cloth into ue4, it was not without problems. I had no tangent error, I pressed that “update tangent space” button, I don’t know if I would had gotten problems without it.
The problems I got:
-my model had more than one cloth, all mapped to different bone. It was working in one case, but missed the bone in the other… don’t know why.
-once I applied the apex file to my materials it has shifted UV, showed other part of my texture than before…
-I found that setting up collision in the apex SDK is very unintuitive (or the problem is with me)…