Tos'köh - Demon Portrait

This is a demon portrait excercise I did to learn some new techniques before going for a bigger CG project. It has taken me a lot of time to do it in spare times and get it to a point that I can call finished.
The initial idea was to make just a Zbrush sculpt, but I decided to take it to the next step and try to get a realistic cinematic look for it.
I'm sharing some wip images and initial sketches below so be sure to scroll down!