Imagine everyday objects that can talk back to you, not with electronics or screens, but simply by changing how they look when you use them. That’s exactly what MIT researchers have achieved with their new ShiftLens 3D-printing system. Instead of relying on fragile circuits or displays, ShiftLens uses layers of tiny lenses and patterned surfaces built right into the object. When you twist, press, or slide a part of the object, the layers shift against each other, revealing a new image or pattern. 3D-printed platform that works using living matterTo overcome this, MIT researchers developed ShiftLens, a system that converts user designs into 3D-printable models with surfaces that can mechanically switch appearances, without electronics.