{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://raw.githubusercontent.com/api-evangelist/threejs/refs/heads/main/json-schema/threejs-object3d-schema.json",
  "title": "THREE.Object3D",
  "description": "A serialized three.js Object3D node as produced by Object3D.toJSON(). Object3D is the base class for nearly all 3D-positioned entities — Mesh, Group, Line, Points, Camera, Light, Bone, Skeleton, etc.",
  "type": "object",
  "properties": {
    "uuid": {
      "type": "string",
      "format": "uuid",
      "description": "Stable identifier for this node, auto-assigned when the Object3D is constructed."
    },
    "type": {
      "type": "string",
      "description": "The Object3D subclass type — e.g. 'Mesh', 'Group', 'PerspectiveCamera', 'DirectionalLight', 'Line', 'Points', 'Bone', 'SkinnedMesh', 'Object3D'."
    },
    "name": {
      "type": "string",
      "description": "Optional human-readable name. Useful for lookups via Object3D.getObjectByName()."
    },
    "matrix": {
      "type": "array",
      "minItems": 16,
      "maxItems": 16,
      "items": { "type": "number" },
      "description": "Local transformation matrix in column-major order (16 numbers)."
    },
    "up": {
      "type": "array",
      "items": { "type": "number" },
      "minItems": 3,
      "maxItems": 3,
      "description": "The up direction used by lookAt(). Defaults to Object3D.DEFAULT_UP which is [0, 1, 0]."
    },
    "visible": {
      "type": "boolean",
      "description": "Whether the object is rendered. Defaults to true."
    },
    "castShadow": {
      "type": "boolean",
      "description": "Whether this object casts shadows."
    },
    "receiveShadow": {
      "type": "boolean",
      "description": "Whether this object receives shadows."
    },
    "frustumCulled": {
      "type": "boolean",
      "description": "When true (default) the object is culled by the camera frustum before rendering."
    },
    "renderOrder": {
      "type": "number",
      "description": "Override default rendering order; lower values render first."
    },
    "userData": {
      "type": "object",
      "description": "Free-form object for caller-defined application data; survives serialization."
    },
    "layers": {
      "type": "integer",
      "description": "Layers bitmask controlling which cameras can see the object."
    },
    "geometry": {
      "type": "string",
      "format": "uuid",
      "description": "UUID reference into the top-level `geometries` array (Mesh / Line / Points / SkinnedMesh)."
    },
    "material": {
      "oneOf": [
        { "type": "string", "format": "uuid" },
        { "type": "array", "items": { "type": "string", "format": "uuid" } }
      ],
      "description": "UUID or array of UUIDs referencing materials in the top-level `materials` array."
    },
    "children": {
      "type": "array",
      "items": { "$ref": "#" },
      "description": "Child Object3D nodes."
    }
  },
  "required": ["uuid", "type"]
}