Bad export

[micheus]

nigec, usually this behaviour has some relationship to the model topology.
I download the model and as it is a very densy mesh I just took a look at the edges length (Select->By->Edge Length).

There is a lot of very narrow faces in the back door's handle - 0.00005 wide only and 0.013 long. This very tiny number can bring problems to wings.

I can say you it's safe to use only four decimal digits values. So, after checked the small values has five decimal digits I just set the Export Scale on the OBJ exporter dialog to a value of 10.0.

Here is the result using Assimp:


That should fix any similar problem with you can have using third part objects that very detailed and small.