Im working on a game with Unity3D and do my models in Silo.
I stared with a box, cutted it and extruded. After exporting to .obj that happened:
Picture: click here
It is not a problem with unity. I had the same problem with .obj files made in silo in other game engines, too. And if i reopen the .obj with silo it looks all fine.
Did i do anything wrong?