magnum/src/MagnumPlugins/AnySceneImporter/Test/materials.gltf

{
  "asset": {
    "version": "2.0"
  },
  "materials": [
    {},
    {
      "name": "Alpha masked and double sided",
      "alphaCutoff": 0.369,
      "alphaMode": "MASK",
      "doubleSided": true
    }
  ]
}