MIT researchers have developed a 3D inkjet printer that uses computer vision to control the amount of material being printed in real-time. The printer can fabricate hybrid structures with both rigid and soft components, allowing for the creation of robotic devices that are strong enough to interact with heavy objects but safe enough to interact with humans. The printer is 660 times faster than comparable 3D inkjet printing systems and can work with slower-curing materials, offering improved performance and stability.