Abstract
Several executives listen attentively to a sharp-suited sales rep making his pitch. Suddenly, a miniature car emerges from a vat of gray goop in the center of the conference table. The salesman proceeds to reshape this model using nothing more than his hands, flattening the car's roofline and adjusting the geometry of its headlamps. Finally, he transforms the car from its initial haze gray to fire-engine red, its "atoms" twinkling in close-up with Disney-movie magic as their color changes. Yes, it's just a video done with special effects. But it comes from researchers at Carnegie Mellon University, in Pittsburgh, who are developing technology intended to enable not just the instant creation of complex objects-far beyond what today's 3-D printing can achieve-but also their transfiguration on command.
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