Select the T-Shirt Open up the Material Editor Select all materials shown in the material list Consolidate all materials to 1 (hit "Consolidate" button) Rename the mesh name (in the example the material is named "default") of the newly created material with the "RE name" button
--> Causes an access violation error ... (at least with the provided file)
IMPORTANT: I made the T-Shirt with MD, exported as OBJ and imported it directly into CC3 as an accessory. (no idea why the mesh is called "default" btw ...)
This is probably a very rare bug - but maybe you guys want to have a look into it? Im not sure, but it could have something to do with a bug I reported recently: