magnum/src/Magnum/SceneTools/Test/SceneConverterTestFiles/two-scenes.gltf

{
  "asset": {
    "version": "2.0"
  },
  "nodes": [
    {}
  ],
  "scenes": [
    {
      "nodes": [0]
    },
    {
      "nodes": [0]
    }
  ]
}