@amethystpendant & @pwiecek this is the ball prop typically used to supplant the James Head for material room root node previews: Head.obj Since Poser will search for a .obj file before a compressed .obz file, the original Head.obz can actually remain in place, while the ball prop's Head.obj will be used. However, as others have advised, it never hurts to make a backup elsewhere, or rename the original.