so, the hashing is taken from rhino api itself.
i just tested and sometimes it does change, sometimes it does not.
for the meantime please use the “force reload” button, it does not overrite materials so it should be fine.
also, nested geometry (blocks) seems to be broken, i will have to have a look in february,
thank you for the heads up!
cheers
ps. could you please upload two files (the before and after changes so i can use it to make sure it works after fixing it) ?
*a quick note, i just realized we’ve hijacking this thread that is about an entirely difference but quite usefull addon. maybe we should move this discussion to the original’s addon thread → Import Rhinoceros 3D files into Blender