Tattoo concept

This is a concept I’m working on at the behest of a friend. She’s asked for a female zombie-ish character with kind of a “splicer from Bioshock feel while retaining some of her beauty”. It’s supposed to be a shot from head to ribs. This is what I have so far. Forgive the crappy gradient background that I threw in there in Photoshop, it’s just a rough draft at this point. Base modeled and sculpted in Blender, hair added in ZBrush and rendered using BPR, and then painted over in Photoshop. Thoughts?

too thoughtful ( or depressed ) for a zombie and maybe more decay and unkempt hair … though I realize this is a ‘rough’ concept sketch.
But good start.