... The thing is all these combined (including kicking windows ink towards outer space and beyond) results in a very responsive, fast, and no-lag brush stroke.... Finally! I've been years without being able to see it in my Photo installations, lol. :D. Is not that you couldn't paint. It's that fresh, spontaneous drawing and painting it was indeed quite a problem. Hopefully it helps to the people doing subtle photography retouching with the brush as well.