You’d think by now we’d have more of a holographic printing industry the same way we have desktop publishing or 3D printing.
We’ve slready got 3D scanning setups - imagine using a 3D model built using existing tech, and then building the classic holography table setup virtually - a raytracing render setup using a computed virtual laser, to reproduce a holographic interference pattern entirely in the computer.
Then it can print that computed holographic pattern direct to emulsion - maybe using a scanning pinpoint laser to expose the medium, similar to how film recorders for early CGI worked.
This way, you could take any scanned object, or a synthetic scene ‘diorama’ from a game or 3D design program, and output it to an actual hologram as easily as using a laser printer.
EDIT: Apparently MIT are on the case, with something called tensor holography
EDIT 2: A company called Litiholo is Kickstarting a desktop hologram printer. (h/t: @adogwithadhd)
Litiholo: Helping create the hologram engineers, entrepreneurs and artists of the future. Hologram Kits for individuals and classrooms.