Spriteset_Map.prototype.addConstrunctionTile = function (regionId) {
  var tilemap = this._tilemap;
  for (var x = 0; x < $gameMap.width(); x++) {
    for (var y = 0; y < $gameMap.height(); y++) {
      var rId = $gameMap.regionId(x, y);
      if (regionId != rId) {
        continue;
      }
      p(rId);
      tilemap._addTile(tilemap._lowerLayer, 2892, x, y);
    }
  }
};
var DOUSEI_MAP_ID = 30;
var CEILING_ID = 7472;
var _Tilemap_prototype__readMapData = Tilemap.prototype._readMapData;
Tilemap.prototype._readMapData = function (x, y, z) {
  if ($gameMap.mapId() != DOUSEI_MAP_ID) {
    return _Tilemap_prototype__readMapData.call(this, x, y, z);
  }
  if (this._mapData) {
    var width = this._mapWidth;
    var height = this._mapHeight;
    if (this.horizontalWrap) {
      x = x.mod(width);
    }
    if (this.verticalWrap) {
      y = y.mod(height);
    }
    var rId = $gameMap.regionId(x, y);
    switch (rId) {
      case 1:
        if (!$gameSwitches.value(71)) {
          return CEILING_ID;
        }
        break;
      case 2:
        if (!$gameSwitches.value(72)) {
          return CEILING_ID;
        }
        break;
      case 3:
        if (!$gameSwitches.value(73)) {
          return CEILING_ID;
        }
        break;
      case 4:
        if (!$gameSwitches.value(74)) {
          return CEILING_ID;
        }
        break;
    }
    if (x >= 0 && x < width && y >= 0 && y < height) {
      return this._mapData[(z * height + y) * width + x] || 0;
    } else {
      return 0;
    }
  } else {
    return 0;
  }
};