Minecraft 1.12.2 Shaders
Running shaders on a version as old as 1.12.2 with 100+ mods installed can cause headaches. Here are the fixes to the most common problems:
So, download OptiFine, pick a shader, and dive back into your favorite modpack. The world looks a little brighter (and the shadows look a little deeper) from here on out. minecraft 1.12.2 shaders
Use 1.12.2 shaders if you play old modpacks or have a mid-range PC. For pure visual fidelity, upgrade to 1.20+ with Iris. Running shaders on a version as old as 1