
I wrote an OBJ importer/exporter plugin in 2009. Some objects were imported 'inverted'. Turns out I needed to multiply the x-ordinate by -1 on import. I had to do the same on export as well. I may need to make this an option, rather than an always-do type of thing. Anyway. I am just glad I finally had the time to give it a serious look and resolve it.
And BTW; I have a workflow question for you folks. If you make your own ship models, do you typically apply your texture in the final, destination app? Or do you add textures in an intermediate app, and expect the textures to be applied in the destination application, on import? I'm just curious.