3D printing has evolved from basic designs to a wide range of highly-customisable objects. Still, there’s a big issue: Once objects are printed, they’re final. If you need a change, you’ll need a reprint. But imagine if that weren’t the case — if, for example, you could change the colour of your smartphone case or earrings on demand. Researchers from MIT’s Computer Science and Artificial Intelligence Laboratory (CSAIL) have gotten closer to making that a reality.