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/fillbiome

Fills a region with a specified biome. Unlike /fill which changes blocks, this command changes the biome data of an area without altering any blocks.

Syntax

/fillbiome <from> <to> <biome> [replace <filter>]

Parameters

Name	Required	Description
from	Yes	One corner of the region (x y z coordinates).
to	Yes	The opposite corner of the region (x y z coordinates).
biome	Yes	The biome identifier to fill (e.g., minecraft:plains, minecraft:desert).
filter	No	When using replace mode, only replaces this specific biome.

Examples

/fillbiome ~-50 -64 ~-50 ~50 320 ~50 minecraft:plains
/fillbiome 0 -64 0 100 320 100 minecraft:mushroom_fields
/fillbiome ~-20 ~ ~-20 ~20 ~40 ~20 minecraft:desert replace minecraft:ocean

Notes

• Requires permission level 2.
• Added in Java Edition 1.19.4 (snapshot 22w46a).
• Biome data is stored in 4×4×4 sections, so the actual affected area may be slightly larger than specified (snapped to 4-block intervals).
• This does not change the existing blocks, terrain, or structures — only the biome classification. You will need to rejoin the world or reload chunks to see visual biome changes like grass color.
• The replace mode is useful for selectively converting one biome into another.

Related Commands

• /fill
• /locate
• /setblock