Here's how I did it this -> [link]
1 - sketch
2 - lines via the pen tool
3 - base flats (dark because they serve as the shadows)
... made by selecting all the skin parts with the polygonal lasso tool
4 - highlights layer 1
... when you create the layer, make it a clipping mask (that way anything you make in this layer won't go outside the base flats layer)
5 - highlights layer 2
... another clipping mask layer
6 - shiny parts
... I usually have my brush opacity around 60 for everything, but this layer I use 30. It gives you more control over just how shiny you want things.
7 - bouncing light to add atmosphere
... another clipping mask. Just lay some coloured light (a different colour than your highlights usually, but of course it all depends on your picture) on the farthest side of your shadows.
fin. (added a tad more eye shine over the inks)
Perhaps Prof. M-f-a-H next?
The brush I created for this -> [link]
The swatch library I made for this -> [link]
If you have questions about the clipping mask layers, brush settings, etc., don't hesitate to ask. Otherwise, ~TheNass
has a pretty awesome tutorial here -> [link]
If you have a mac and/or aren't able to play that tutorial, I'll get a full-length version to you. I had to do some converting for it.
If you use this, please, for my own curiosity's sake, link to me what you've done! I'd just like to see your work!