[
  {
    "type": "mapgen",
    "method": "json",
    "//": "This mapgen exist only for suppressing 'No mapgen terrain exists for %s' type of errors on game start and shouldn't spawn ingame",
    "om_terrain": [ "unexplored" ],
    "object": {
      "rows": [
        "                        ",
        "                        ",
        "                        ",
        "                        ",
        "                        ",
        "                        ",
        "                        ",
        "                        ",
        "                        ",
        "                        ",
        "                        ",
        "                        ",
        "                        ",
        "                        ",
        "                        ",
        "                        ",
        "                        ",
        "                        ",
        "                        ",
        "                        ",
        "                        ",
        "                        ",
        "                        ",
        "                        "
      ],
      "terrain": { " ": "t_null" }
    }
  },
  {
    "type": "mapgen",
    "om_terrain": [ "omt_obsolete" ],
    "method": "json",
    "//": "this mapgen is used for replacing obsoleted overmap terrain, normally it shouldn't spawn",
    "object": { "fill_ter": "t_nether_glass_floor" }
  }
]
