This is one of several old concepts that I worked on several years ago - for a film that is still in development. I have been given the approval to share at long last.
The character had to look a little like a specific actor, so I sculpted a basic head shape in Zbrush for lighting and speed and then did most of the work in photoshop ( sadly I don't have the Zbrush model as I no longer work for the same company). Not going to say much more as I hope the film will still go into production in the near future ;)