docs: function getBoundaries (object) {
    if (object._isw3dObject) {
      var size = object.size;
      return {
        left: 0,
        right: size.x,
        top: size.y,
        bottom: 0,
        far: 0,
        near: size.z
      };
    }
    else {
      const bbox = getBboxFromObject(object);
      return {
        left: - bbox.min.x,
        right: bbox.max.x,
        top: bbox.max.y,
        bottom: - bbox.min.y,
        far: - bbox.min.z,
        near: bbox.max.z
      };
    }
  }