To set the brightness of all blocks and air to maximum, regardless of actual light levels (0–15). Appearance:
It keeps all original textures; it only changes light levels. Performance-Friendly:
This write-up covers what it does, why it's useful, and how to get it working in 1.12.2. What is Fullbright (1.12.2)?
Most Fullbright packs work by modifying the game's lightmap to ensure that even at a light level of 0, the game renders the textures as if they are in full sunlight. Key Features & Benefits Effortless Caving/Mining:
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