File Name- Fullbright-mod-fabric-1.21.4.jar Work -

To use this mod, you must have the and Fabric API installed for Minecraft version 1.21.4.

Launch Minecraft using the "fabric-loader-1.21.4" profile. Once in-game, the mod should activate automatically. You should notice that caves are no longer pitch black.

The most robust method for modern Fabric mods involves a injection into the LightmapTextureManager class.

The cave system below the jagged peaks of Mount Aether was notorious for its "unnatural" shadow—a darkness so thick that even the brightest torches flickered out in seconds. For weeks, Elias had been stuck at the bedrock level, unable to find the diamond vein he needed to complete the village’s beacon.