

Yes, the image and the title says it all.
Why is this happening?
I followed Avanya's guide on Steam (Retexturing existing models - A beginner's guide), but used a vehicle instead.
I exported the asset Scania Citywide LF (by DanDeKalb) with ModTools.
I edited the diffuse images and flipped the obj file (as the guide said), and then exported the obj to a fbx with all the settings as Avanya posted in her guide. The asset is working as it should originally, but as the image shows, that happened. Note that this is my first vehicle to repaint, the only thing I've done custom is to add more ice/snow on a road which is a bit easier.
Please help!
Thanks in advance.