Download Optifine HD v.C4 [1.12]

After you install Minecraft, the first thing you should do is, of course, put Optifine. This mod adds support for HD textures and many configuration options to improve the overall performance. Just need Optifine for slow computers because it provides a stable FPS and reduces lags. One of the important "features" fashion is to support shaderparam why there is no need to install a mod for shaders