This is an interesting project I discovered through chrome web lab, called sketchbot, it uses a on-line robot at the science museum in London, where your webcam portrait can be physically drawn into sand. The processes that are going on are all the more amazing when you discover that they are mostly just run in your browser using HTML5’s Canvas Elements. This video gives you some incite, but it is even more fascinating to create your own portrait, but you will need to be using the chrome browser and have a webcam on your computer (and a google account)
Watch for more on the theme of “Written in the Sand” in some photoprojects to come. This was just too much of a coincidence for me not to have a play with right now.