'Anti-Gravity' 3D Printer Uses Strands to Sculpt Shapes on Any Surface

3D printers build objects by cross-section, one layer at a time from the ground up--gravity is the limiting factor. But what if it wasn't? Using proprietary 3D printing materials, Petr Novikov and Saša Jokić's Mataerial 3D printing system is gravity independent. The duo's method allows a robotic arm to print objects on floors, walls, ceilings--smooth and uneven surfaces.