Simply adjust and configure the gamma as you wish.

Important note, on 1.12.2 and 1.20.1(for strange reason), the gamma setting is not connected/related with the default brightness slider. But you still have the main GUI adjustment (keybinds are configurable)

Note: The mod will be rewritten to be more convenient and less buggy. Will be ported to newer versions.

The source code will be released soon under MIT license. The logo will be changed as well to something more accurate.

Gamma adjustment (Toggle with G)

For 1.21.1, default brightness slider works too

Adding this mod in a modpack and publishing it to curseforge is highly appreciated, thanks!