- fix issue that blender 4.2 lost use_auto_smooth and calc_split_normals. (it almost works but not perfect. still need more debugging)
- remove depracted material blend_mode. use modern one instead. (the modern setting make me consufes but it works)
- add extra transform for rail creation.
- remove scale from extra transform because it is rarely used. because Ballance can not handle the physicalization of scaled object.
bring ballance virtools helper used fix_texture (renamed as fix material to correspond with the real object operated by this function) into blender plugin.