tid_ocean

Open-ocean surface shader for the tides part, applied to a Geo.grid mesh (dense core, geometrically expanding rim). The vertex stage displaces the grid with a six-wave Gerstner sum — one long swell rolling toward the camera, two secondary swells, three chop bands — and passes the undisplaced field coordinates to the fragment stage through uv.

The fragment stage recomputes the analytic Gerstner normal per pixel, layers two octaves of scrolling detail chop plus a micro glitter jitter, and blends by fresnel between the deep-water body (crest subsurface glow looking into the sun, sea_scatter × sss_strength) and a reflection of sky_env — the same sunset environment tid_sky renders, so the water mirrors the dome exactly. The HDR sun disk inside that reflection, scattered by the jittered normals, forms the glitter path; glitter_boost adds a music-reactive sparkle lobe on top.

Whitecap foam rises from the Gerstner crest factor; foam0..foam5 (x, z, radius, strength in field space) add churning collars around whatever pierces the surface — the part feeds them the chrome ring's waterline points and the glass monolith bases. game_t drives every animation so director seeks land deterministically. Aerial perspective melts far water into the same horizon color the dome shows at eye level.