Note: Some servers have plugins that prevent this, but a dedicated Fullbright Texture Pack often bypasses those limitations. Is it Cheating? The "fairness" of Fullbright depends on where you play: Totally fine. It’s your world!
Select the pack in-game. Crucial Step: Go to Video Settings and ensure your Brightness is set to "Moody" or "Bright" (some packs require one or the other to "kick-start" the effect). Why Use Fullbright Over Night Vision Potions? fullbright texture pack 1.12.2
Unlike "Shaders" which can tank your FPS, a Fullbright texture pack uses zero extra resources. Note: Some servers have plugins that prevent this,