Structure Spawn Area Fix

Mobs normally spawn only in a structure's bounding box, which is small, so mods that add spawns near shipwrecks rarely produce results. The mod checks a larger area around each potential spawn point and extends the search by an additional radius set in the configuration, given as a whole number of blocks. Structures are named with a namespaced ID such as minecraft:shipwreck.

The expansion is set per mob category, with options such as monster, creature, ambient, underground water creature, water creature, water ambient and misc. Each entry can be limited to specific biomes by a namespaced biome ID, a biome tag such as minecraft:is_ocean, or left open, and restricting it to specific biomes is recommended for performance. Where a biome's regular mob spawns are overridden, the structure-specific ones take their place.

The default configuration fixes a problem seen with the Alex's Mobs mod, where Skelewag spawns at shipwrecks were rare. With the fix applied, those spawns occur at a noticeably higher rate. Other mobs that spawn poorly near structures can be fixed by adding another entry for them. The mod runs on the server only, so players join without installing it, and it is published for Forge and NeoForge for 1.20.1 under All rights reserved.