2026-05-05 05:31 UTC
@foerterer@mastoart.social It might be easier to visualise by imagining there is only one hole, and it's being scanned in front of the screen like a crt raster. Wherever it is at any instant, there is a unique image being generated on the screen behind it. That image is shining out through the pinhole, as though it's the lens of a projector. The result is as if there are thousands of projectors in a grid, making up the image. Each one looks different depending on where your eye is, which is why it's 3D.
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@ancientjames@mastodon.social 2026-05-05 05:34
@foerterer@mastoart.social The trick with multiple holes is to split up the generated image on the screen to make multiple projectors, so it doesn't have to do it one at a time (by trading off some of the resolution of the panel). If you were to watch the screen in slow motion, you would see little fish-eye regions scrolling past in sync with the holes in the drum. (and in fact you can sort of see that at the end of this video https://mastodon.social/@ancientjames/116338945925889785 )