Worthy of Five Star Rating.
Not many offerings at the App Store rate five stars; this is one of them. I did the math once, and seem to remember something like over seven thousand permutations possible per picture. Some might not like the occasional rendered result, so move on to the next and you most probably will be pleased with the results. In short: Worthy Shtuffe!
RoJoWo about
Brushstroke, v2.2