Last time I played with harmony sketch, I found a cool bug/feature. I wanted to know if you knew about it…
If you open it up and use the grid mode to draw a bunch of dots on the screen, then switch to a different mode (like long fur) and hit clear it will immediately render all of the grid dots connected with fur. You can then cancel and save the image. I know it works in safari… not sure about other browsers. Is that an intentional behavior?
Lots of other incredible demos on his portfolio page: http://mrdoob.com/blog