The project was started because, according to the developer, there were not enough suitable mods for an easy shader installation. By the way, everything is completely free. This software solution has already been downloaded over five million times since its first release. You can decide for yourself whether to install it with the installer or with a modloader, such as Fabric or Quilt. It is the link between shader packs and Minecraft.
Minecraft Iris shaders mod has been one of the most popular Minecraft add-ons for years, is up-to-date, and runs without lags.