Holographic projection is a 3D technology without glasses, and the audience can see three-dimensional virtual characters. This technology is widely used in some museums and stages, such as 3D fashion shows using 3D holographic projection technology. More popular on the Japanese stage. Holographic stereoscopic projection equipment is not realized by digital technology, but the projection equipment projects images from different angles onto a holographic film imported from abroad, so that you can't see other images that don't belong to your own angle, thus realizing real holographic stereoscopic images.
The four-prism holographic projection mentioned by the landlord uses this principle, but it is usually used in product display, shoes and clothing display, museums and the like!
For the special four-prism holographic projection video, Baidu search: deep creation, there are many videos in this regard.