Sometimes, the pack requires you to push the brightness slider. Go to Options > Video Settings . Drag the Brightness slider all the way to the right ("Bright"). If the pack is working, you should see no difference between a sunny field and a deep cave.

: In your Resource Packs menu, make sure the Fullbright pack is at the

In this article, we'll dive into the world of texture packs, explore the features of the Fullbright Texture Pack 1.12.2, and guide you through the process of installing and using it.

: Permanently illuminates the world, making caves and nighttime look as bright as day. Mob Interaction

Also, 1.12.2 has stability and Forge mods that easily enable Fullbright.

Installing a Fullbright pack is identical to installing any standard resource pack.