Shader packs change how the lighting works in your "Minecraft" world. That might not sound like much, but once you start using these shaders, you'll quickly see how big a difference they can make.

The 28 best Minecraft shaders for 1.21.8 The best Minecraft shaders turns your blocky world into a sight to behold, with fluffy clouds, rays of light, and rustling leaves.

For Iris Shaders (for modern visuals and fabric users), go to the Iris Shaders page— https://irisshaders.net, download the Fabric version for 1.21.5, and then install it using the Fabric mod loader.