Sketch or _Sketch is a veteran at numa. He was skeptical to join the forums at first but eventually got around to it. Sketch is known for his tile sets back in the day. His game play lacks a little bit. He is moderately active on the forums but you can catch him around. Sketch has had many maps that other users have enjoyed but one of his many successes can be found here - http://numa.notdot.net/map/18296.
He used to post a lot of maps on numa and be well known but is becoming less existent and loosing interest mainly because he cannot submit maps to numa anymore.