For those of you interested in learning "comic book" style digital coloring I have to recommend the training CDs from Brian Haberlain. They're older (PS 5/6) but still applicable and are a great insight into how this is done. He is not a great speaker, but you can gain alot just watching along. http://www.digitalarttutorials.com/
Although targeted toward aspiring comic colorist, the techniques are defintely transferrable to creating textures for 3d applications. There are snippets of each tutorial on the above link.
Vedic, cool sketch. I think you may have to play with effects to pull this look off... look forward to the WIPs on this.