I know I'm still a novice, but IMO you should also put a light border around the shirt collar and the shirt bottom. To do the shirt collar and sleeves, you would have to put a line (your Border) on the top sleeve area and raise and lower it to match it up with the neck collar area. Do you understand what I am saying? I'm not talking about the bottom line (Border) of the sleeve, I'm talking about the top. Only the top doesn't match up with the neck perfectly on this 3D model girl so you would have to play with it to get it to line up right. Very nice head and skin though.