hborre posted at 12:28AM Mon, 09 April 2018 - #4327715

You could use the original object file rather than export and re-importing. But, again, as mentioned, it depends how the mesh is constructed for the clothing which could give problems. You may need to go as far as modifying the object file in a third-party modeling program to clean up the mesh for dynamic use.

It shouldn't make a different whether you use the original or an exported one, if the export settings are correct. As you said i think the only real solution is to modify it in a 3rd party program and try to cut out the inner part. But i doubt it will turn out very well. :)