It gave me some sort of DeJaVu with Photoshop's brush engine.
The principle ideas of Stickers works a bit in the same way.
Wich isn't negative. Not at all!
In fact. It's gonna make AR3 even more great.
I have to dive into it a bit more. But if you are able to pull off the exact same stuff as with Photoshop's brush engine and ability to make custom brushes like that.
Then wow! Then AR is sertainly on the right track to give some serious headaches to the competition.
They still have a long way to go. But they are slowly getting there.