Don't forget to mention the Dynamics and colorize each stroke. The feature is tricky. I still haven't figured out their use of it, except for using it almost like a wash brush - smear doesn't do stood job of it, only in very low flow settings. Problem is that the app doesn't have a "background" (or second) color in eyedropper settings. Without that you'll have to go and edit brush every time you need to change the mixture color. It has to be more dynamic. Plus it needs to be also mixed to transparency.