Fullbright UB

Fullbright UB is a client-side resource pack for Minecraft Java Edition that raises in-game brightness to its ceiling, so caves, ravines, and night-time surface travel stay readable without a torch in hand. A resource pack cannot change game code, so it works by rewriting the lighting textures the game draws with rather than by adding a brightness slider. That is why you need the pack build that matches your Minecraft version, and why it behaves slightly differently under Sodium than it does on plain vanilla.

What the Fullbright resource pack changes in game

Block and item textures stay vanilla. The pack only touches how light is applied, so dark areas render evenly lit while everything keeps its normal shape and colour. Mining, exploring a deep cave, or crossing a forest at night no longer depends on placing light sources, and you can leave torches out of the hotbar entirely. It stacks on top of other packs, so a texture pack like Clarity can sit underneath it in the pack order.

• Version 6.0 covers Minecraft 1.21.9, 1.21.10, 1.21.11, and the 26.1 drop through 26.1.2.
• Version 5.0 covers 1.21.6, 1.21.7, and 1.21.8.
• Version 4.0 covers 1.21.1 through 1.21.5.
• Older releases reach back to 1.19, so most historical worlds have a matching build.
• Java Edition only. The Modrinth listing carries no Bedrock download.
• Client-side. Nothing is installed on a server, and the file is around 233 KB.

How to install the Minecraft fullbright texture pack

1. 1.Open the Modrinth project page and pick the pack version that lists your Minecraft version.
2. 2.Download the .zip file. Do not unzip it.
3. 3.In Minecraft, go to Options, then Resource Packs, then Open Pack Folder.
4. 4.Drop the .zip into that folder, then move the pack to the selected column and click Done.
5. 5.If you use Sodium, install PolyTone first, or the lighting change will not apply.

Our resource pack install guide walks through the same steps with screenshots if you have not loaded a pack before.

Compatibility with Sodium and OptiFine

The project lists vanilla, OptiFine, and Sodium as supported setups. Sodium replaces Minecraft's renderer, so the pack's lighting changes do not load on their own there. The creator points Sodium users at PolyTone, a small companion mod that restores the pack loading path Sodium drops. Install PolyTone alongside Sodium and the pack behaves the same way it does on vanilla. On OptiFine no extra mod is needed.

Known limitations

Maximum brightness flattens the game's atmosphere. Caves stop feeling like caves, night stops feeling like night, and the lighting contrast that makes builds look good goes with it. If you only want to spot ores in the dark without losing the mood, Glowing Emissive Ores is a narrower answer. The other limit is version drift. Because the effect depends on the game's current lighting files, a build made for one Minecraft version can quietly do nothing on a newer one, so match the pack version to your game.