Resource pack for Java Edition 1.16.3
This is a vanilla shader that measures the average luminosity of the screen and smoothly adjusts the gamma to raise the visibility of dark scenes.
Why would you want to do this? It's something content creators do for their videos in post very frequently as some areas of the game have poor visibility, however other areas are fine (Nether vs oveworld during day).
This shader dynamically adjusts the gamma, so the overworld will look somewhat normal, but caves and the nether will have improved visibility.
Enable Fabulous Graphics in video options. Requires a somewhat good GPU.
Click View Raw for AutoGamma.zip below to download the ZIP, then drop it into Resource packs folder.
nice!