{
  "type": "minecraft:jigsaw",
  "biomes": "#minecraft:has_structure/trail_ruins",
  "max_distance_from_center": 80,
  "project_start_to_heightmap": "WORLD_SURFACE_WG",
  "size": 7,
  "spawn_overrides": {},
  "start_height": {
    "absolute": -15
  },
  "start_pool": "minecraft:trail_ruins/tower",
  "step": "underground_structures",
  "terrain_adaptation": "bury",
  "use_expansion_hack": false
}