New beta driver Crimson ReLive Edition 17.5.1 seems to have fixed this.

A WHQL version of Crimson ReLive Edition 17.4.4 is out now and is now the latest stable driver, but it still suffers from the artifacting. So need to upgrade to new beta driver Crimson ReLive Edition 17.5.1.

Just updating this to say log file emailed to info@paintstormstudio.com a day or so ago.

Yes, even after resetting the brush the issue still remains, well if I increase the brush size to be large again that is. Even after deleting "Documents\Paintstorm Studio" folder the issue still remains.

Ok, so turns out I don't know how to reproduce this issue 100%. If it doesn't get critical error it seems it won't until maybe closing and relaunching Paintstorm. Sometimes it crashes, sometimes it doesn't. Sometimes it crashes several times in a row, sometimes it will work fine several times in a r...

When selecting Double Brush 8 I get a critical error. Seems to only happen if GPU acceleration is turned on.

Paintstorm seems to still use CPU when not doing brush strokes. I'm guessing it repaints the screen aggressively even while idle or some other update to do with canvas since it still uses the CPU even when application is minimized. The larger the canvas, the more CPU is used.

I attempted to make a post about this a few days earlier, but it seems it didn't work as I still can't see it. So I'll keep this one short. I am getting artifacts with each brush stroke when GPU acceleration is enabled. The artifacts do not appear if GPU acceleration is disabled. I can easily reprod...