GltfMaterial
constructor(name: String, alphaMode: String?, doubleSided: Boolean?, normalTexture: GltfMaterialTexture?, occlusionTexture: GltfMaterialTexture?, emissiveTexture: GltfMaterialTexture?, emissiveFactor: DoubleArray?, pbrMetallicRoughness: GltfPbrMetallicRoughness?, extensions: GltfMaterialExtensions?)(source)