/fillbiome Command
Changes the biome in the rectangular volume defined by two corner coordinates to the specified biome. Because biomes are stored in 4×4×4 block cells, the command snaps to cell boundaries and affects all cells overlapping the selection. Only changes the biome tag; does not alter blocks or entities.
Syntax
fillbiome <from> <to> <biome>Permission: 2Edition: Java
Examples
fillbiome ~ ~ ~ ~50 ~50 ~50 minecraft:desertfillbiome -100 -64 -100 100 320 100 minecraft:cherry_grovefillbiome ~-8 ~-8 ~-8 ~8 ~8 ~8 minecraft:the_voidfillbiome ~ 60 ~ ~31 80 ~31 minecraft:mushroom_fieldsNotes
Exclusive to Java Edition. Added in Java Edition 1.19.4 (snapshot 22w46a). Biome changes take effect visually after the client reloads the chunk (e.g., by moving away and back). The selection is snapped to 4-block biome cell boundaries, so the filled region may be slightly larger than specified. Changes persist through reloads. Does not affect mob spawning until chunks are reloaded.