I put together a step-by-step guide recording my process while I made this picture of Morrigan from Darkstalkers.
(BTW I use Photoshop) You can read it for free here:
https://docs.google.com/document/d/1Bv5g4IWN-viuUk4B4EFOi5MGvfVhXJ3gO98DL9ieMfo/edit?usp=sharing