OcclusionX

Culling something you can't see (Modern Port of Brute force Rendering Culling)

by
48 Downloads
fabricoptimization
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About this Mod

Brute force Rendering Culling Description:

Introduce

Brute force Rendering Culling (hereafter referred to as the mod) is an optimization mod in terms of rendering. Utilizing Hierarchical Z-Buffer Occlusion Culling technology, this mod can additionally cull some invisible chunks beyond the vanilla game, reducing a portion of the overhead in chunk compilation and rendering. It's designed to alleviate the problem of decreased rendering efficiency due to excessive blocks and entities in later stages of mod packs. It can achieve some frame rate improvements in environments with many occlusions, but no significant frame rate boost is observed in open vistas. Any entities and chunks that are not visible in the player's view will have their rendering submissions canceled at the CPU stage. When used in conjunction with Sodium (Embeddium), better optimization results can be achieved. It is compatible with Iris, Oculus, Nvidium, and OptiFine.

The mod settings default to using the "R" key to open, and key bindings can be changed in the settings.

Compatibility:

  1. Due to the use of GPU instantiation to assist computation, entity culling functionality cannot run on graphics card devices that do not support OpenGL 3.3. If your device can run the Sodium, it can also support instantiation entity culling functionality. This mod utilizes a portion of GPU computation to alleviate CPU culling and chunk compilation overhead. If your GPU doesn't have additional computational power to render culling textures, it may slightly reduce the maximum frame rate in open vistas, typically below 5%.
  2. After simple testing and compatibility processing, this mod is compatible with Sodium, Embeddium, Rubidium, Iris, Oculus, and OptiFine in MC version 1.18. Starting from MC version 1.20, it no longer supports Rubidium.
  3. In Minecraft version 1.18.2, Rubidium is supported only in mod versions 0.5.4 and below. Since Rubidium is no longer updated, mod versions 0.5.4 and above only support Sodium and Embeddium.
  4. In Minecraft version 1.18.2, the Async Rebuild Chunk feature uses independent chunk searching. Therefore, when the Async Rebuild Chunk feature is enabled, the Valkyrien Skies mod's chunk updates will not rebuild correctly.

NOTE: OcclusionX is just a Modern Fork/Maintained/Port version of Brute force Rendering Culling.

ORIGINAL OWNER: RogoShum

Available Versions

OcclusionX 0.5.12alpha
MC 1.21fabric
March 21, 2026

How to Install OcclusionX on Your Server

1

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

2

Set fabric Loader

In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21).

3

Install Mod

Open the mod browser in the dashboard and search for "OcclusionX". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

fabric

Minecraft Versions

1.21

Server-side

Unsupported

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

OcclusionX server crashes on startup – what to do?

Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21). You can switch loaders with one click in the panel.

Is OcclusionX compatible with fabric?

OcclusionX officially supports fabric for Minecraft 1.21. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with OcclusionX – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if OcclusionX consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.

Rent Modded Server

Install OcclusionX with just one click on your server.

Recommended RAM
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Min. 3 GB | +1 GB pro 8 Spieler
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Details

License
GNU Lesser General Public License v3.0 only
Server-side
Unsupported

Supported Versions

1.21