RegionIO/internal/worldgen/data/structure_json/ruined_portal.json
Daniar Mannanov c488ce274f worldgen: parse structure sets and place them on the vanilla grid
Loads the 26.1.2 structure datapack: 20 structure sets, 34 structure
definitions, and the worldgen biome tags they reference. Random-spread
placement follows RandomSpreadStructurePlacement byte for byte — region
floorDiv by spacing, one Legacy stream salted per region, two
spread-type draws for the offset — and the four legacy frequency
reducers keep their exact draws, including the hardcoded buried-treasure
salt and the outpost's discarded full-range int.

Verified against the fixture: on seed 12345 the ruined_portals set
claims exactly chunk (1,0), the chunk whose captured blocks carry the
ruined portal's obsidian, gold, and crying obsidian. TestStructure-
PlacementGrid pins that plus village separation invariants.
2026-08-26 10:33:10 +03:00

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JSON

{
"type": "minecraft:ruined_portal",
"biomes": "#minecraft:has_structure/ruined_portal_standard",
"setups": [
{
"air_pocket_probability": 1.0,
"can_be_cold": true,
"mossiness": 0.2,
"overgrown": false,
"placement": "underground",
"replace_with_blackstone": false,
"vines": false,
"weight": 0.5
},
{
"air_pocket_probability": 0.5,
"can_be_cold": true,
"mossiness": 0.2,
"overgrown": false,
"placement": "on_land_surface",
"replace_with_blackstone": false,
"vines": false,
"weight": 0.5
}
],
"spawn_overrides": {},
"step": "surface_structures"
}