No worries! Sent you the email with the files :)
29 days ago(+1)
Hi,
so I testet it in a few application and only unreal engine could show it correctly:
The problem are corner faces with concave polygons. Depending on the engine and how it handles the triangulation, it can appear different errors.
If you want to go sure such problem doesn't appear, just triangulate the mesh before export.
Kind regards
Union Bytes