I've just spent half a day to try to import a textured model in your generator :
I tried :
FBX 6100 with external texture
FBX 2013.1 with embed media
DAE with external texture
OBJ with external texture
I tried also several settings of FBX export thank to FBX converter 2013 from autodesk )
The model is correctly imported on Paint3D with any of these files !!!
I'm trying to figure out this week the efficiency of model generated targets..
What should I do ?