Duration: 0:53

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This video is inspired by recent the Steve Mould's video "Handmade holograms are really weird" about purely geometric "holograms" that instead of utilizing wave optics, use purely geometric specular reflections and are constructed by creating patterns of scratches in acrylic. Unfortunately those "groovy holograms" only allow to rotate the hologram around one axis (vertical in his case), but you can't view them from arbitrary angles.

So I decided to investigate if there's a way to make a specular hologram that allows encoding arbitrary view angles. And this is what I came up with: specular flakes. They are scattered randomly and are only visible if they direct light directly into the camera. This allows me to scatter them in a way that encodes light field of an arbitrary 3d object, although precision is not exactly amazing for now.

I'll see how far I can push this approach and will post more videos if I get any interesting progress.