SMRTR ProgrammingSep 1, 2026lobste.rs

A physics-based lighting system for CSS

SMRTR summary

Ambient CSS is a physics-based lighting framework for CSS that replaces arbitrary shadow utility classes with a deterministic lighting engine. Define a light source — direction, intensity, and hue — and every shadow, highlight, surface gradient, and edge treatment across all child elements updates consistently. Calibrated against Blender raytracing, it supports pure CSS and a React component library.

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