1. removed redundant node. (identical geometry)

    Closed
    #176191555 0 1 1 0

  2. added building.

    Closed
    #176188243 23 15 0 0

  3. tweaked ways.

    Closed
    #176186555 7 23 1 0

  4. connected walls.

    Closed
    #176180060 1 2 0 0