lectable = true;
      return boxNode;
    }

    function initHands() {
      for (const box of boxes_left) {
        scene.removeNode(box);
      }
      for (const box of boxes_right) {
        scene.removeNode(box);
      }
      boxes_left = [];
      boxes_right = [];
      boxes = { input_left: boxes_left, input_right: boxes_right, input_none: boxes_none, tracked_left: tracked_boxes_left, tracked_right: tracked_boxes_right, tracked_none: tracked_boxes_none };
      if (typeof XRHand !== 'undefined') 