The authors created several shapes using this method, including spheres, cones and saddles. They were able to control the buckling and the shapes by controlling the light exposure, which they did using various sizes of photo-masks. The method can turn a two-dimensional sketch into a three-dimensional object. It could even work with a variety of materials — with electroactive polymers, for instance, you could send a current through some portions of a polymer and not others, forcing it to bend and contort. The research was published last week in Science.