A guy I know wants to create one of those photos with two alternating strip images on, it that changes the overall view depending on the angle of viewing - facilitated by hundreds of tiny plastic prisms in the coating on the photograph.
Neither of us know what the hell they’re called, and thus are unable to Google it.
Yeah, I’ve always to know, too! Many people mistakenly call them holograms, but this is way wrong. Two entirely different things…but I can understand why one might think so. Especially due to the lack of having the right term floating around in our pop-tech lingo!