unit: 3 2 0 -1

verts:
    "0": "map_vert0"
    "1": "map_vert1"
    "@": "map_bgvert"
edges:
    "0": "map_edge0"
    "1": "map_edge1"
    "2": "map_edge2"
    "=": "map_bgedge"
faces:
    "0": "map_face0"
    "1": "map_face1"
    "2": "map_face2"
    "3": "map_face3"
    "S": "map_savepoint"
    "D": "map_door"
    "w": frame_offset(1) "map_water"
    "o": "map_bgface"
    "E": frame_offset(1) "map_face_energy_on"
    "e": "map_face_energy_off"