If you were interested in buying a Bamboo graphics table, the fun bundle includes Corel Painter Essentials 4 and Paintshop Prop X2 for under $90 (not bad considering that any one of those items is roughly that cost). Painter is the best application to make something look like a painting. I haven't found any Poser Sketch presets that come close. Some shaders might, but I haven't played around enough with them to find out.

My visual indexes of Poser content are at http://www.sharecg.com/pf/rgagnon