anchor.diff:      loader.load(device.ctx, url).then((m) {
         m.position.setValues(0.0, -1.0, -1.0);
         m.animator.switchAnimation("Idle");
  -      var controllers = html.querySelector("#controllers");
         m.animator.animations.forEach((n, a) {
           var row = new html.DivElement();
           row.className = "row";
  
positive.code:       m.castShadows = true;
        mesh = m;
      });
  
      var plane = _createPlane(6.0);// new Plane(width: 10, height: 10);
      plane.rotation.rotateX(-PI / 2);
  
negative.code: class MyScene extends Scene {
    MyScene(PerspectiveCamera camera): super(camera);
    Mesh mesh;
    bool rotateCamera = false;
  
    @override
    enter() {
  
      var controllers = html.querySelector("#controllers");
      camera.position.setValues(0.0, 2.0, 4.0);
      camera.lookAt(new Vector3.zero());
      var url = "http://127.0.0.1:3030/orange/models/ogre/alric.orange";
  