cloud_noise_v3

Volumetric-cloud noise fill (Schneider/Hillaire style), v3 variant. Low-frequency FBM base silhouette + high-frequency FBM surface erosion for the billowed cumulus look, with altitude shaping (round bottom, full middle, anvil top). Writes the 3D cloud density texture.

Bindings (see bindings.yaml): clouds (storage3d rgba16f — the cloud volume), U (read array<f32> uniforms).

Usage: dispatch by identity with compute.dispatchEx("@builtin::systems.volumetrics.shaders.cloud_noise_v3", ...) (storage texture requires resource binding, not positional buffers) — it resolves to the shader's stable guid and auto-compiles on first use (no setup).