[CR] Pencil Art: Classic Skull

You know what is the good thing about human skull drawings? They never get old. This was my first attempt on drawing such an anatomical piece, which has been the center of several art niches in history. Shading this drawing can be very teddious without a proper skull to watch but in the end it can be very satisfying. Although I'm far from the master skill and detail of Dr. Netter's plates and anatomical arts, my motivation keeps increasing.