scatter.js ray-marches a single-scattering Rayleigh+Mie atmosphere whose vertical optical depth is
sun.js's TAU, and bakes two tables into baked.scatter: transmittance to space by view elevation
(32x1) and sky radiance by azimuth from the sun x view elevation x sun elevation (7x32x12), RGB
half floats, little-endian base64, value x 64. Layout, exact decode and a GLSL sampler are in
src/sky/README.md. Tests pin layout, encoding, checksums and physical anchors (zenith transmittance
equals exp(-TAU); blue noon, red low sun toward the sun, black below the planet-shadow limit).
The per-sky sun {elevation_deg, azimuth_deg, color_linear}, ambient_linear and horizon_hex were
already baked in 7216456a; sun.js now exports TAU.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Two themes replace the navy GameCult theme. Every colour is a bark, leaf, soil
or pigment albedo times the irradiance sun.js gives for a fixed moment (equinox
noon and midnight, 45N). scripts/bake-sky.mjs writes src/sky/baked.ts: the
terrain-free sky gradient used as the fallback background, folds tokens for
panels and buttons, chat bubble colours, link and name colours.
skyTokens.test.ts holds every text pairing to WCAG AA and fails if baked.ts is
stale.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
