I did this piece with reference of Iva Kanceska who is a model and owner of skin-artists.com. I feel this piece was one of my best I've ever done as far as black and gray realism. I'll post a healed picture later in a couple of weeks.
The left (her left) eye looks a little off, maybe its missing eyelashes? It looks like a zombie eye almost, I know it's closed just a little off. Other than that dude you nailed the perspective and super smooth shading! Nice use of white too, I've been seeing white get overdone alot.