Finished 60% of my character, I made the head separately from the body, I used "append" option to bring the head into the body scene and then merge it.
For some reason, even after connecting the neck vertices to the head, when I add skin material, it only applies to the head and not the rest of the body, I don't know why this happens, I select everything but only the head changes.
BTW the head mesh looks more glossy than the body , I don't know what caused this


