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Brian Neumann-Fopiano
2026-08-11 20:35:27 -04:00
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docs/94 - API - Modded.md
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@@ -282,13 +282,15 @@ Iris replaces the chunk generator. Vanilla/mod worldgen runs only if Iris runs i
| System | Over Iris? | Notes |
|---|---|---|
| Structures (vanilla, datapack, mod) | **Yes**, on by default | Vertical fit, stilts, vegetation clear. Deny: `importedStructures.disabled` |
| Structures (vanilla, datapack, mod) | **Yes**, on by default | Vertical fit, stilts, vegetation clear. Deny families with `importedStructures.disabled`, one complete key with `disabledExact`, or scale an exact structure set with `frequencyOverrides` |
| Placed features (ores, trees, plants, …) | **Yes**, **off** by default | Dimension `importedFeatures.enabled` |
| Carvers | **Never** | No noise router / aquifer for vanilla carvers |
| Mod biomes as sources | Only as derivative / scatter targets | Iris chooses biomes from the pack |
| Mob spawning (incl. mod mobs) | **Yes** | Merges pack biome table with vanilla derivative |
| Surface builders / rules | **Never** | Pack palettes |
`importedStructures.frequencyOverrides` has Bukkit parity on all three mod loaders. Entries use `{ "structureSet": "namespace:path", "multiplier": 0.01..16 }`; keys are exact registered structure-set keys, last duplicate wins, and changes affect new chunks only. Random-spread sets scale probability first and then derive the nearest legal integer spacing, while concentric rings can scale probability only. Custom placement types outside the affected override and exclusion-zone graph remain untouched; an unsupported placement that must be copied fails level binding rather than applying a partial override. Full semantics and the Nether `1.1` example are in `22 - Native Structures & Datapacks.md`.
### `importedFeatures`
Disabled by default. Absent or `enabled: false` → no feature table; terrain matches long-standing Iris-only output. Biome tags of the vanilla derivative are always inherited on custom biomes (not gated on this flag). Structure tags `#minecraft:has_structure/*` are **not** inherited.