CSS is DOOMed (nielsleenheer.com)
https://nielsleenheer.com/articles/2026/css-is-doomed-rendering-doom-in-3d-with-css/

CSS is DOOMed!
Every wall, floor, barrel, and imp is a div — DOOM rendered entirely in CSS. Using 3D transforms, CSS math functions, @property, clip-path, anchor positioning, and SVG filters to build a fully playable 3D first-person shooter in the browser without Canvas or WebGL.

