I didn't touch the weapon, I recoloured the nack (had no idea how to edit it! And most of all: WHY to edit it! :D) and the face was just edited. All others were made from scratch. Comment please. (Size reduced!)
Try darking the edges of the armor with a small black line using the burn tool. (if you use photoshop that is) Might decrease a little bit of the blurryness. I think it looks pretty nice though GJ. Also i agree with Pins about the weapon.
