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