: Launch Minecraft 1.12.2, navigate to Options > Resource Packs , and click Open Resource Pack Folder .
The Fullbright pack edits the light emission properties of the game’s block models. Essentially, it removes the "dimming" effect of low light levels. When you use this pack, the game renders every block as if it were fully lit, effectively turning night into day and illuminating pitch-black caves instantly. fullbright 1.12.2 resource pack