I did all of the work in Photoshop 7, as far as the face is concerned, Painter 8 was used in the last step for textures only.
This is cropped from the original line sketch, I think it's upscaled to 200%, since I don't feel the need to sketch at the final print size, so the lines are a little blurry.
My colour palette. The smaller purple and blue dots at the top are what I used for the hair. The light green-blue is what I wanted the secondary light source to be, I ended up using a much lighter and brighter colour in the final steps. The line sketch is on a Multiply layer above
