The problem here is grass. Setting there in 3dsimed - apha sort offset - must be 0 Don't understand where this option in the materials editor?
It's simply called "Offset" in the gMaterial panel. Some free advice on this subject: avoid using the offset unless it's absolutely necessary; and if you HAVE to use it, don't go higher than 3 for track materials .
I also was sure of it. In the editor you specify 0 after export 2. But it was just a glitch! I created gmotor material again
