ArPhEx: BOP Integration

Where ArPhEx spawns its mobs is controlled by the natural spawning system. This addon changes which biomes those mobs appear in: it adds selected Biomes O Plenty biomes to the spawn lists, keeping the original spawn weight of each entry. The base mod's spawning logic stays in place, so ArPhEx keeps working as before. A full list of the mobs and their spawn biomes is kept in a separate document linked by the author.

Each mob can be set up individually in a config file. Spawns can be enabled or disabled for each modded biome, spawn weights and group sizes can be adjusted, and the biomes a mob appears in can be chosen exactly. The mod ships with two separate config files: one covers overworld spawns and the other covers Nether spawns. The config also allows other modded biomes to be used, though those have to be added by hand.

The addon targets 1.20.1, 1.20.4 and 1.21.1, with Forge builds for 1.20.1 and NeoForge builds for 1.20.4 and 1.21.1. It needs ArPhEx and Biomes O Plenty to be installed, and it runs on client and server, so both the server and every player need it. The source code is published under the MIT License, and the issue tracker is public.