if you've gotten a mouth guard made by a dentist recently where they just scan your teeth, that's a 3d printed part. the ones that look the most spectacular are the anatomical models for surgery, where they can take something like an mri of a problem area and print it out with a mix of materials and colours that makes them realistic enough to practice on.

content warning: 3d printed hand and foot parts with visible veins

as far as i understand it they can do full CMYK as well as mixing material to requested hardness and consistency on the fly.