“Bally” areas on clothing occur more around areas of friction. Accessories such as bags or heavy over coats could account for it.
Here it has occurred on a two month old tshirt worn only a few time. Affected area is around my hip area on the right side due to how I wear my bag on my shoulder.
In super hi def movies of the future and maybe next gen video games, this detail could add character and realism even if it is pretty finicky detail to add.