And now for something completely different... Snurfing around I find equipment to 3D print in plastics, metals, ceramics and.... glass from sand using sunlight to melt. This guy is really cool. He thinks he can build a house in the desert using a bigger machine and nothing but sand and sunlight. The Solar Sinter by Markus Kayser http://static.dezeen.com/uploads/2011/06/dezeen_The-Solar-Sinter-by-Markus-Kayser_15.jpg Along the same lines, sand and ceramics for printing large structures are being explored in Dubai architecture. Part of the deal for the future, is that some of the home made designs won't be printed at home. But rather, sent to a fabrication 3D printing shop for larger scale and/or special fabrication materials. That can somewhat be done already. Imagine designing your own car body, and having it printed up and delivered to your garage. So... if you 3D scanned a Ferrari, and lowered the resolution from smooth curves to chunky triangles... What would it look like? I'm pretty sure this shape would be rather stealthy on the road. Lo Res by United Nude http://static.dezeen.com/uploads/2010/07/dzn_Lo-Res-by-United-Nude-91.jpg