Unlike many shader packs, which focus on creating a sense of realism by making light bend and move in a more realistic way in Minecraft, Acid Shaders is more for people who want a surreal experience that breaks away from reality. This shader pack doesn’t require any additional software or mods to work correctly, so you should be able to just install it and play with it, especially since it is not resource-intensive like many other shader packs.
It may have some issues working with the latest version of Minecraft (1.19) because Acid Shaders came around a few years ago, back before any of the new items, objects, and models were added to the game. The Acid Shaders mod is like many other shader mods in that it affects the way lights, shadows, and shade work in the world of Minecraft.