, orient);

          // Make transparent placeholder node of the same size for quad layer
          // The placeholder node is in projection layer and thus can be used
          // for hit test
          quad2Collider = new QuadNode(QUAD_TRANSPARENT_MONO_PATH, 1, true);
          quad2Collider.translation = [1, 0, -2];
          scene.addNode(quad2Collider);
        });

        session.requestAnimationFrame(onXRFrame);
      });
    }

    function onEndSession() {
      xrSession.end();
    }

    functi