: Unzip your shader pack (if it came zipped) and place it in the shaders folder.
: Most modern packs include "Low," "Medium," and "Extreme" profiles in the shader options menu. Always start at and move up. How to Install for 1.12.2 for 1.12.2. Optifine HD U G5 (the most stable version for 1.12.2 shaders). Place your chosen shader packs into the shaderpacks folder in your .minecraft directory. In-game, go to Video Settings to select and customize your pack. specific shader packs ranked by their performance impact on 1.12.2?
: The best option for low-end PCs or heavy modpacks. It provides essential effects like shadows and reflections with minimal performance cost. Quick Setup Guide To get these running on version 1.12.2, follow these steps: How To Download & Install Shaders in Minecraft 1.12.2
If your game crashes with "No OpenGL context":
Here is how to "develop" a better shader experience for this specific version: 1. Swap Optifine for the Performance Trio