If you prefer not to use a texture pack, you can achieve a similar effect by manually editing your game files: Press Win + R , type %appdata% , and navigate to .minecraft . Open the options.txt file with Notepad. Find the line that says gamma:1.0 .
Best for: Modded gameplay & low-end PCs. minecraft 1.12.2 fullbright texture pack
A fullbright texture pack is a custom resource pack that replaces the default textures in Minecraft with brighter, more illuminated versions. This allows for increased visibility in dark areas, making it easier to explore and build without the need for additional light sources. If you prefer not to use a texture
No mods required — just drop this into your resource packs folder. Works in caves, night, and the Nether. [Download link here] Compatible with OptiFine and vanilla. Best for: Modded gameplay & low-end PCs
It works by editing the light properties of in-game block models to emit maximum luminance, or by manipulating the game’s gamma settings through texture files. The result?
: Increasing your gamma above 5.0 is generally banned in official speedrun categories.