Fullbright 1.12.2 Resource: Pack

The Fullbright resource pack for Minecraft 1.12.2 is a popular, simple, and effective tool designed to make the game world uniformly bright, eliminating dark corners, deep caves, and nighttime shadows. Essentially, it creates a "permanent night vision" effect without the need for potions or light sources like torches

In the Minecraft menu, select the Fullbright pack to move it to the "Selected" side and click "Done". Optional (OptiFine): While some packs work without it, using OptiFine 1.12.2 fullbright 1.12.2 resource pack

It keeps all original textures; it only changes light levels. Performance-Friendly: The Fullbright resource pack for Minecraft 1

Everything is perfectly visible. Caves, the Nether, and the End appear lit, and underwater areas are crystal clear. Mechanism: eliminating dark corners