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Performance tweaks

If the modpack runs badly on your computer, there are several things you can do to improve performance.

Easy improvements

  • Close other open applications
  • In the Video Settings menu (Pause menu -> Settings... -> Video Settings...)
    • Reduce the render distance
    • Change Smooth Lighting to OFF
    • Change Clouds to OFF
    • Ensure Graphics is set to Fast
    • Use VSync may improve or decrease performance - if Minecraft runs at ~60fps turn it on, if it's lower (e.g. ~30fps) turn it off
    • Fullscreen mode may improve performance, if Borderless Mining is not installed
    • Do not change Mipmap Levels, it is likely to crash your game
  • In the installer (appears while launching the game), click Optional mods..., and ensure the following are disabled:
    • ConnectedTexturesMod
    • Blur
    • Borderless Mining

Advanced tweaks

If the above tweaks aren't enough, here are some more difficult (but potentially more potent) tweaks you can try.

  • If you have enough RAM, increase the amount of RAM allocated to the instance in MultiMC, by adjusting Minimum memory allocation and Maximum memory allocation in the instance settings (Edit Instance -> Settings)
    • For best performance, keep Minimum memory allocation and Maximum memory allocation the same
    • Your computer cannot allocate all of your RAM to Minecraft, you need to leave at least 1GB or so for Windows (or switch to Linux)
  • In MultiMC, press the Config Folder button to open the config folder (changes will require the game to be restarted)
    • In foamfix.cfg, change B:disableTextureAnimations=false to B:disableTextureAnimations=true
    • In foamfix.cfg, change B:disableRedstoneLight=false to B:disableRedstoneLight=true
  • As a last resort (this is untested and is very likely to cause problems), install Optifine for Minecraft 1.12.2, just drop the JAR in the mods folder