Rain, Snow, and Wet Surfaces

Couple appearance to causes: one time source and wind field drive airborne precipitation, while one owner per receiver integrates deposited rain or snow. Visual particle count samples the weather; it never sets the deposited mass.

Use Three.js r185 WebGPURenderer, TSL, storage nodes, node materials, and the node post stack. Initialize the renderer before allocating compute or storage:

await renderer.init();

if (renderer.backend.isWebGPUBackend !== true) {
  throw new Error('This weather path requires the WebGPU backend.');
}