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Biome Control Engine (BCE)
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Take full control over biome generation.
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Runs entirely on the server. Also works in singleplayer.
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Biome Control Engine (BCE) is a utility mod that gives you a size multiplier, a rarity multiplier, and a Y-height range for every loaded biome, plus an in-game browser to find and edit them. Works with vanilla and modded biomes.
Features
- Size multiplier — values above 1.0 increase a biome's climate footprint, below 1.0 decrease it
- Rarity multiplier — independently of size, controls how often a biome wins over competing biomes for the same spot
- Y-height range — set a minimum and/or maximum world height a biome is allowed to generate at
- Automatic priority — a customized biome is automatically guaranteed to generate within its configured range instead of losing out to climate comparison; turns off again once reset to default, nothing to toggle by hand
- Works with modded biomes — any biome registered by any other mod is automatically detected and configurable
- In-game settings screen — search, select, and edit biomes without leaving the game or hand-editing JSON
- Movable, resizable biome browser — drag it by its header, resize it from the corner, position and size are remembered
- Biomes sorted into per-dimension folders — Overworld, Nether, End, and one folder per mod that adds its own dimension
- Flags biomes that never generate — a dedicated folder lists any biome that's registered but doesn't appear in any dimension (usually a mod/datapack conflict); editing is disabled for these, with an explanation shown instead
- Three ways to open it — mod list, a button on the title screen/options menu/pause menu, or a rebindable hotkey (F4 by default)
- Plain JSON config — changes are autosaved to
config/biomecontrolengine/biomes.json
Extra info
- Modpack usage: You can use this mod in your modpack without asking
- Biomes browser in the config screen will be populated after the first world load

Biome Control Engine (BCE) is a utility mod that gives you a size multiplier, a rarity multiplier, and a Y-height range for every loaded biome, plus an in-game browser to find and edit them. Works with vanilla and modded biomes.
Features
- Size multiplier — values above 1.0 increase a biome's climate footprint, below 1.0 decrease it
- Rarity multiplier — independently of size, controls how often a biome wins over competing biomes for the same spot
- Y-height range — set a minimum and/or maximum world height a biome is allowed to generate at
- Automatic priority — a customized biome is automatically guaranteed to generate within its configured range instead of losing out to climate comparison; turns off again once reset to default, nothing to toggle by hand
- Works with modded biomes — any biome registered by any other mod is automatically detected and configurable
- In-game settings screen — search, select, and edit biomes without leaving the game or hand-editing JSON
- Movable, resizable biome browser — drag it by its header, resize it from the corner, position and size are remembered
- Biomes sorted into per-dimension folders — Overworld, Nether, End, and one folder per mod that adds its own dimension
- Flags biomes that never generate — a dedicated folder lists any biome that's registered but doesn't appear in any dimension (usually a mod/datapack conflict); editing is disabled for these, with an explanation shown instead
- Three ways to open it — mod list, a button on the title screen/options menu/pause menu, or a rebindable hotkey (F4 by default)
- Plain JSON config — changes are autosaved to
config/biomecontrolengine/biomes.json
Extra info
- Modpack usage: You can use this mod in your modpack without asking
- Biomes browser in the config screen will be populated after the first world load
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