Princess Leia “Hologram” Vapor Display

“Based on the concept behind commercial units, but using everyday items (drinking straws, scrap PVC pipe, a kid’s humidifier from the thrift store, some scrap computer fans), he rigged up a device that creates a thin, even sheet of vapor mist. Almost translucent, but able to catch the light projected onto it from a rear-facing projector — which gives an eerie, floating hologram effect…”