This is Brad Rigney, also known as Cryptcrawler. He is an awesome self-taught illustrator. You can find samples of his work at cryptcrawler.deviantart.com He has a very cool style; full of life and energy. I recommend getting his tutorial from theartdepartment.org/store It is a 4.5 hour long tutorial that takes you through his philosophy, process, and technique. Hope you like it.