.BO4 File Extension

OpenTerrainGenerator Custom Structure

Developer PG85
2.0  |  1 Vote
Category Game Files
Format Text

What is a BO4 file?

A BO4 file is a custom structure created and used by OpenTerrainGenerator, a Minecraft modding application used to create worlds. It contains plain text data that defines a structure. Large structures may be comprised of many linked BO4 files.

More Information

Minecraft Java Edition players can install the OpenTerrainGenerator plug-in and use it to create and load custom Minecraft worlds. Each OpenTerrainGenerator world is generated using one or more biome configuration (.BC) files. In turn, each biome configuration file references a set of BO4 files, which contain information about custom structures that appear in the biome.

BO4 files are created in-game using the /otg export StructureName -bo4 command. The referenced structure is then exported as two or more BO4 files. The first BO4 file, named StructureName.bo4, contains settings that apply to the entire structure and define placement, distribution, and blending with terrain. Each subsequent BO4 file contains information about an up-to-16x16 block section of the exported structure. When creating a custom world, modders place BO4 files in the world's WorldObjects directory.

NOTE: You can convert .SCHEMATIC files to BO4 files using OTGEdit.

How to open a BO4 file

You can open and edit a BO4 file in any text or source code editor, such as Microsoft Visual Studio Code (cross-platform). Keep in mind that editing a BO4 file may break the custom structure the BO4 file defines.

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Programs that open or reference BO4 files

Updated November 8, 2021

Verified by FileInfo.com

The FileInfo.com team has independently researched the OpenTerrainGenerator Custom Structure file format and Mac, Windows, and Linux apps listed on this page. Our goal is 100% accuracy and we only publish information about file types that we have verified.

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