It started as a face study and marker practice and kind of evolved. I was in steam powered chat all day and had nothing better to do than spend 12 hours on a tiny picture. Sorry the file is small, the original picture is only about 4 inches high.
Done with prismacolor liners and copic markers.
The Spine from Steam Powered Giraffe
Referenced from this photo
by Dan Regal of Geekshot photography.