Strange Material Problem

Hey guys, I made this low poly tank.

It’s the same exact model just different Material (to distinguish Red Team, Green Team).

But for some reason the Green tanks (FRONT) is messed up… (Don’t pay attention to the tracks) as I haven’t messed with them yet.

Just the front of the tank…

Is there any ideas of what could be going on guys?

I wouldn’t even know what to call this.

It looks like some flipped vertices, but why isn’t the red tank doing it?

Thanks in advanced


I’m so sorry for wasting space!

All I had to do was go to 3ds max and change in the exporter (I Unticked) - Triangulate and cut on Turbosmooth.