You can't do a violent snowman design without evoking Calvin and Hobbes, so why not just do it as a Waterson-style watercolor? I tried a whole bunch of new stuff with this. I did all the inking with the ink brush in Manga studio. I've never used a brush before to ink virtual or otherwise. I also used a program I picked up a while ago called Art Rage to do watercolor painting. It simulates the behaviour of wet paints. you can do all sorts of interesting watercolor effects with it like blending wet paints together, or creating a fade by just applying water to applied pigment.