In addition to this setup, where the balls reveal an image hidden underneath, you can also set it up to have flames track behind the balls, or water that ripples as the balls pass over it. It's a pretty awesome trick, one that works surprisingly smoothly.They're working on new software that will make it more useful than flashy, too. Imagine playing pool and having the lines where you should shoot projected down on the table, with a computer doing all the math necessary to show you just where to aim and how hard to hit.