Individual skill

threejs-procedural-planets

Author procedural planetary bodies in Three.js. Use for spherical terrain, continents, ridges, craters, biome masks, coastlines, material variation, analytic normals, altitude LOD, and bodies that must hold up from orbit through close approach.

skills/threejs-procedural-planets/SKILL.md

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SKILL.mdcore · 2,925 bytes
agents/openai.yamlasset · 304 bytes
examples/procedural-planet-surface/example-render.jpegasset · 88,408 bytes
examples/procedural-planet-surface/planet-system.jsruns · 13,944 bytes
examples/procedural-planet-surface/terrain-field.jsruns · 2,563 bytes
references/planet-field-and-atmosphere-systems.mddoc · 12,576 bytes

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# Procedural Planets

Build a planet as a coupled field system evaluated on a unit direction. The same geological causes must drive geometry, color, roughness, normal, atmosphere handoff, and distance filtering.

This skill contains exemplary examples and assets beyond descriptive guidance,
they're worth studying, referencing, or even copying. Use them sufficiently
when relevant and do NOT blindly skip them.

## Required build order

1. Establish planet-space direction, radius, sea level, and world-unit scale.
2. Build macro silhouette fields before any surface material.
3. Add named geological structures: continents, basins, ridges, craters, lava fields, or ice.
4. Derive slope, cavity, altitude, latitude, exposure, and shoreline fields.