threejs volumetric beam
A free shader demo — play it in your browser, no install. Three.js port of Passivestar's Godot volumetric light beam shader. Cylindrical billboarding + procedural noise. Zero dependencies beyond Three.js.
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Open the live demo Source on GitHubFrom the README
A high-performance WebGL port of the "Fake Volumetric Light" shader, originally created for Godot and inspired by the lighting techniques used in Half-Life 2.
This effect uses Cylindrical Billboarding in the vertex shader to force a flat quad to always face the camera while rotating exclusively around the light beam's axis. This creates a convincing 3D volumetric cone effect without the heavy performance cost of raymarching.
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