message: demo: Fix frustum culling for instanced meshes
  GLTFLoader.js instancing support didn't properly deactivate frustum
  culling before due to Object3D.prototype.copy call.
diff: @@ -1034,6 +1034,9 @@ THREE.GLTFLoader = ( function () {
  THREE.Object3D.prototype.copy.call( instancedMesh, mesh );
  THREE.Object3D.prototype.copy.call( instancedMesh, node );
  + // Reset frustumCulled back to false, since it was set to true by .copy above
  + instancedMesh.frustumCulled = false;
  +
  parser.assignFinalMaterial( instancedMesh );
  return instancedMesh;
  