@ Boeven: Thanks for the compliment. As for conversion problems, I've not had any after finding out some basic do's and don'ts way back when I started importing my illustrator files into in-game maps. The hardest part has always been keeping the design simple enough that it stays within the map's 200 elements. What I wouldn't give for at least double that limit or the ability to include fills! Often I need to redraw sections of my design just to reduce the number of bezier curve points to the minimum possible just so I won't have to delete any more detail than necessary, because I almost always end up with over 200 elements at first. Unfortunately, this reduces the amount of detail possible along with losing subtleties within lines.
@ Ligh: Yeah, that's what I was guessing... filters like some of Kai's power tools. Realistic looks are difficult to get with the one's I've tried though. I have used them before in photo composites, but never in my digital paintings. I won't use any automated texturing or photographs in my paintings because I want those to be all me.