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Raycasting from Scratch: How We Faked 3D in the 90s

A 9-minute video by Dr. Pavel Vlašánek about algebra and geometry and computing mechanisms, on the From scratch shelf. It came up in 2 Reddit threads, in r/GraphicsProgramming.

Dr. Pavel Vlašánek, Video, 9 min, 2026, on the From scratch shelf

The 3D worlds you remember from old games are built on a massive mathematical lie and today, we’re coding it from scratch.

Open on YouTube

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