I've been working on this illustration based on the book A Storm of Swords, with some influences from the TV show Game of Thrones. Done mostly in SAI with some photoshop. I haven't finished my own painting in a while, feels great. This was a challenge for me as well since I haven't really applied what I learned to do a full color painting from imagination.
Some progress pics: http://imgur.com/a/3xw0g