{
  "id": "particle_galaxy",
  "name": "Particle Galaxy",
  "description": "A swirling galaxy of particles emitted from a sphere, pushed by turbulence and gravity, rendered as glowing sprites.",
  "tags": ["particle", "3d", "galaxy", "generative"],
  "difficulty": "advanced",
  "td_version_min": "2022",
  "nodes": [
    {
      "name": "geo",
      "type": "geometryCOMP",
      "comment": "Renders the particle SOP nested inside it (not its default torus)"
    },
    {
      "name": "sphere",
      "type": "sphereSOP",
      "parent": "geo",
      "parameters": { "radx": 1, "rady": 1, "radz": 1 },
      "comment": "Emitter surface, nested inside geo"
    },
    {
      "name": "particle",
      "type": "particleSOP",
      "parent": "geo",
      "render": true,
      "parameters": { "life": 4 },
      "comment": "Particle simulation fed by the sphere; this is the rendered geometry"
    },
    { "name": "mat", "type": "pointspriteMAT", "comment": "Glowing sprite material" },
    { "name": "cam", "type": "cameraCOMP", "parameters": { "tz": 6 } },
    { "name": "light", "type": "lightCOMP", "parameters": { "tx": 3, "ty": 4, "tz": 4 } },
    { "name": "render", "type": "renderTOP", "comment": "Rendered galaxy" },
    { "name": "out1", "type": "nullTOP" }
  ],
  "connections": [{ "from": "sphere", "to": "particle" }, { "from": "render", "to": "out1" }],
  "parameters": [
    { "name": "geometry", "node": "render", "param": "geometry", "value": "geo" },
    { "name": "camera", "node": "render", "param": "camera", "value": "cam" },
    { "name": "lights", "node": "render", "param": "lights", "value": "light" },
    { "name": "material", "node": "geo", "param": "material", "value": "mat" },
    {
      "name": "lifetime",
      "node": "particle",
      "param": "life",
      "value": 4,
      "min": 1,
      "max": 20,
      "label": "Particle Lifetime"
    }
  ],
  "preview_description": "A slowly rotating spiral of bright point-sprites drifting outward from a glowing core."
}