St. Louis (KSDK) -- If you're a Star Trek fan, you've seen something called a "replicator" that can make any object on-demand.
That's science fiction.
In real life, objects as diverse as guitars and airplane parts can be printed as a 3 dimensional object.
Newschannel 5's Art Holliday spoke to several experts about the fascinating future of 3D printing.
Click on the video player to see how the technology is becoming mainstream.