Here is a step-by-step comprehensive guide on how you can download, install, and use the shaders within Minecraft 1.21.5 to ensure the best visual experience.

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.

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.

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.