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threejs-volumetric-clouds

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Mis à jour12 juillet 2026 à 18:30

Implement volumetric cloud systems in Three.js. Use for weather-driven density, bounded raymarching, shape/detail erosion, vertical profiles, lighting cones, silver lining, temporal reconstruction, cloud shadows, multiple layers, and scalable quality modes.

Installation

Installer avec Codex ou Claude Copiez ce prompt, collez-le dans Codex, Claude ou un autre assistant, puis laissez-le vérifier la page du skill et l'installer pour vous.

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Source

scottstts

scottstts/Threejs-Awesome-Graphics-Agent-Skills

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Métiers associésSOC

Basé sur la classification professionnelle SOC

Développeurs de logicielsProfessions informatiques et mathématiques·SOC 15-1252

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100 fichiers

SKILL.md

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name	threejs-volumetric-clouds
description	Implement volumetric cloud systems in Three.js. Use for weather-driven density, bounded raymarching, shape/detail erosion, vertical profiles, lighting cones, silver lining, temporal reconstruction, cloud shadows, multiple layers, and scalable quality modes.

Volumetric Clouds

Cloud quality comes from density organization, lighting, and temporal stability—not from increasing march steps over unstructured noise.

System order

Define the cloud volume and layer bounds.
Generate or source weather, base-shape, detail, and turbulence fields.
Build a density function with vertical and weather profiles.
Raymarch only the bounded occupied segment.
Integrate transmittance and lighting front-to-back.
Reconstruct low-resolution output temporally.
Project a separate low-cost cloud-shadow solution.

Read references/weather-volume-and-reconstruction.md before implementing or auditing the cloud system.

Read the weather volume cloud entry and its source/ modules for weather-layer ownership, spherical shell bounds, authored shape/detail sampling, cloud shadow maps, temporal upscale, atmospheric composition, and package-owned diagnostics.

Required controls

coverage, cloud type, precipitation, and anvil bias;
base/top altitude and vertical density profile;
shape/detail scales and erosion;
wind for each field;
primary step count, light step count, and empty-space policy;
history weight and disocclusion threshold;
cloud-shadow extent, resolution, and update rate.

Failure conditions

density is only fbm(position);
the raymarch traverses the full camera range;
detail noise adds density instead of eroding shaped masses;
temporal history is accepted across disocclusion;
shadows use the full beauty raymarch;
every cloud layer shares the same wind and density profile.

Routing boundary

Use $threejs-atmosphere-aerial-perspective for molecular/aerosol scattering without weather density. This skill owns weather-shaped cloud volumes, reconstruction, cloud lighting, and cloud shadows.

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name	threejs-volumetric-clouds
description	Implement volumetric cloud systems in Three.js. Use for weather-driven density, bounded raymarching, shape/detail erosion, vertical profiles, lighting cones, silver lining, temporal reconstruction, cloud shadows, multiple layers, and scalable quality modes.

Volumetric Clouds

Cloud quality comes from density organization, lighting, and temporal stability—not from increasing march steps over unstructured noise.

System order

Define the cloud volume and layer bounds.
Generate or source weather, base-shape, detail, and turbulence fields.
Build a density function with vertical and weather profiles.
Raymarch only the bounded occupied segment.
Integrate transmittance and lighting front-to-back.
Reconstruct low-resolution output temporally.
Project a separate low-cost cloud-shadow solution.

Read references/weather-volume-and-reconstruction.md before implementing or auditing the cloud system.

Required controls

coverage, cloud type, precipitation, and anvil bias;
base/top altitude and vertical density profile;
shape/detail scales and erosion;
wind for each field;
primary step count, light step count, and empty-space policy;
history weight and disocclusion threshold;
cloud-shadow extent, resolution, and update rate.

Failure conditions

density is only fbm(position);
the raymarch traverses the full camera range;
detail noise adds density instead of eroding shaped masses;
temporal history is accepted across disocclusion;
shadows use the full beauty raymarch;
every cloud layer shares the same wind and density profile.

Routing boundary

Use $threejs-atmosphere-aerial-perspective for molecular/aerosol scattering without weather density. This skill owns weather-shaped cloud volumes, reconstruction, cloud lighting, and cloud shadows.