🔮 Scarecrow's Spell Orb: Glow, Colour and Spectra Lab

A friendly low-poly scarecrow lets you tune a glowing spell orb: set a blackbody temperature from 800 to 12,000 K and watch the colour computed from Planck's law and the CIE colour matching functions, light virtual gas tubes (H, He, Ne, Na) to see their line spectra, read them with a diffraction-grating spectrometer, and match colour cards on a CIE chromaticity diagram.

3D · Three.js / WebGL renderer · 60 FPS target · runs fully client-side, no install