This resourcepack uses the new lightmap shader introduced in 1.21.2 snapshots to increase the brightness without any mods. You can control the brightness with your in game brightness slider!
This works in Vanilla minecraft and with Sodium. No mods required.
You may run into issues when using shaders
If you want to use this with my other pack that fixes night vision in 1.21.9-1.21.11, go to the 1.21.9-1.21.11 version in the versions tab and click the download button underneath the main one that says "Boosted Brightness NV Fix" or click here
If you want a fullbright where lighting is uniform (e.g. lighting is the same in a cave as the surface) or darkness is boosted check out Fullslide by blockerlocker
Brightness 10 (This is the vanilla max without this resourcepack):
Brightness 50:
Brightness 100:
