Creature Spawning
The spawner chooses from each biome's friendly and hostile class lists, filters by aquatic state and terrain height, then performs weighted selection.
Chunk attempts
- Friendly attempt
- 1 in 12
- Hostile attempt
- 1 in 7
- Insect attempt
- 1 in 28
Biome authority
BiomeProfile friendlyMobs and hostileMobs lists are used by MobSpawner; MobClass.spawnBiomes is serialized but not read by that spawner.
Day and caves
- Each biome subtracts its dayTimeHostileMobReduction from the hostile population target during daytime.
- 20% near the cave origin, scaling to 100% at distance 200
Insects
Only spawn outside while there is no precipitation; biome chunk spawning uses a 1-in-28 attempt and the global insect spawner caps the active count at 50.