he interesting textures, drips, and bleeds all happen naturally in Rebelle. Wet color washes into neighboring paint, plus it has "undo," layers, as well as .PSD support - critical features for illustration work since clients often request changes. Rebelle is amazing. Highly recommended.
Rebelle is available at http://www.escapemotions.com and v2.0 will be available later this month with all the new features!