Installing Optfine on FTB/Technic [MC1.5.2 and below]

Tekkit? Feed the Beast? All texture compilations (WIP and full releases) for mod packs go in here.
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Post 05 Oct 2014, 01:08

For Windows Only

Downloading Optfine

  • On the start menu for whatever mod pack launcher you are using check the version number in the bottom left hand corner
  • Go to and choose the corresponding version number and click download

Installation on Feed the Beast

Installation on Technic Launcher

  • Go to "%APPDATA%/.techniclauncher"( type it in the "Search for Programs " on the windows start menu.
  • Select a modpack from the list of folders, for this guide we shall be using voltz

Open the "bin" folder
Right click on modpack.jar and open with WinRAR or another archving tool
  • Copy the files from the optfine zip into modpack.jar click ok on all messages
  • Close both zips

  • Launch the modpack you choose to install optfine on, in this case voltz
  • Its Installed!
  • If you are worried about anything going wrong, backup modpack.jar