Triangles missing on model when exporting from Blender to Roblox

[BeATBOIXNG_ThAnOs (Timmy_Vermicelli)]

2. What is the issue? My model is missing triangles where it didnt in Blender:
   

   
   
   
   

3. What solutions have you tried so far? I applied all scales and corrected all the faces orientation. I tried exporting with obj but it didnt work too.

[Baad_Buddy]

Try triangulating all of the faces on the mesh before exporting from blender. I’ve found Roblox sometimes doesn’t like non-triangular faces, so hopefully this’ll fix things.