This is an image I produced by starting with an existing image of a female face. I then drew over it in Photoshop with my Wacom Cintiq. The only things I did very little changing on was the eyes and lips although they don't just like the original photo I used they still remain sharp and very realistic.
This image was inspired by H.R. Giger who is best known for the aliens in the Alien movie series and has recently passed away. This was drawn for a tattoo sleeve I am currently working on.