I had just bought a Surface Pro 3, mainly to use for art. Well, I had Paint Tool Sai up and running with N-Trig Wintab working fine. Soon after, I started getting this ripple effect whenever I pressed down.http://s18.postimg.org/m3kbzi9wl/3601707_orig.png I also own a Wacom Intuos 5, and have encountered this problem with it in the past. All I had to do was restart my computer. Now that the tablet is the computer, restarting doesn't help. The only solution I have found was resetting the entire computer, and the effect comes back soon after. This is probably a simple fix, and I hope I'm just overlooking it.