Make sure there are no n-gons in your mesh. If you're using 3ds Max, apply a Turn to Poly modifier to your mesh with Limit Polygon Size set to 4, collapse and re-export.If the FBX exporter finds n-gons in a mesh it will automatically triangulate the mesh (might behave the same in other 3D applications).
So I want a render of my model with it's wire frame, but I can't seem to get quads. All I get is a triangulated mess. It is some how possible and some help would be real damn nice.