I didn't experiment with the sketch renderer very much, because it takes soooo long and the results are not always predictable. I haven't tried my own parameters either, so I'm not sure what potential may be hidden in this goodie. But I can imagine that some people kept fiddling with the parameters and that there are a lot of good render settings out there in the community. Strange enough, I never saw one of them posted in the Free Stuff section. Does nobody want to share their settings? It may help to see some more pictures in the gallery which were made with this technique. Just a humble question of mine...