Diposting pertama kali oleh Zappy:

...or alternatively just use Blender's "Triangulate Faces" option to turn the polygon entirely into triangles.

Yep, that worked perfectly. Thanks!

I've made a model that appears fine in Blender, but when I go to export it, I get a bunch of extra triangles where there should be a gap. I tried removing the collision model to see if that changed anything, and I got the same result. I have a feeling the problem has something to do with the reference mesh being concave, but from my searching online it doesn't seem like that's an issue. What exactly am I doing wrong here?

Blend file: https://pasteall.org/blend/5b83f349e3c34c01ae21e8bbae70b955
Qc file:
Resulting model: https://imgur.com/a/1dHcs4J