Valles Aurorae — a playable Mars valley at sunrise

A single-file three.js game. No assets, no build step — every texture, mesh, sound and the fallback score are generated from math at runtime.

Run

Open index.html in a browser (it loads three.js from a CDN), or serve it:

python3 -m http.server 8000
# → http://localhost:8000

Play

Input	Action
Click	lock cursor / start
WASD + mouse	walk and look
Shift	run
Space	jump (0.38 g — bound up the canyon walls)
Hold left-click	rocket thrust toward where you look (60 m/s)
Hold right-click	ultrafast burn (260 m/s)
M	music on/off
Esc	release cursor

Objective: follow the trail of 17 glowing energy cores down the valley and up the flank of Olympus Mons to the summit caldera (~7 km out, ~1,600 m up). Cores refill your rocket fuel (+35); fuel also regenerates while you stand on the ground. The fuel bar and distances live in the bottom-right HUD.

What's procedural (everything)

• Terrain — infinite, streamed in 180 m chunks around the player. Heights come from a pure terrainHeight(x, z) function (fBm value noise + ridged multifractal canyon walls + a meandering valley floor), so physics and visuals can never disagree, and revisited terrain regenerates identically. Normals are analytic, so chunk borders are seamless.
• Olympus Mons — a shield-volcano profile with caldera, flank channels and basal escarpment, folded into the same height function: it is real, walkable ground, with a haze-baked far-distance mesh for the horizon view.
• Ground material — a Worley-noise pebble field, packed fines and desiccation cracks baked into seamless color / normal / roughness maps at startup.
• Rocks — noise-displaced, flat-shaded boulders that rest half-buried, clustered as talus near the canyon walls. Big ones have cylinder collision: they block you, and you can stand on them.
• Sky — a GLSL pre-dawn Mars atmosphere: dusty horizon band, near-black zenith with stars, and the real Martian quirk of a blue scattering halo around the rising sun. Bloom, procedural lens flare, drifting dust.
• Audio — rocket rumble and pickup chimes from raw Web Audio oscillators, plus a synthesized organ score (ticking clock, ostinato, swelling pads). If a file named interstellar.mp3 that you legally own is placed next to index.html, it plays on loop instead (the file is git-ignored and must not be committed).

License

Code: MIT. Bring your own music.