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Welcome to r/OptiFine | PLEASE READ BEFORE POSTING!
u/MrCheeze455
MOD •
https://www.reddit.com/r/Optifine/comments/eb73s9/welcome_to_roptifine_please_read_before_posting/

Welcome to r/OptiFine!

Before participating in our community, we ask that you read the rules list in the subreddit sidebar. Additionally, if you've found a bug or issue, please do not report it on this subreddit. This forum is NOT for tracking bugs, and all posted issues will not be seen by the developer. Please report all bugs on the OptiFine GitHub repository: https://github.com/sp614x/optifine/issues

With that said, enjoy your stay! You'll find plenty of other useful resources and information to get started with OptiFine in the following post.

 

Resources

Download OptiFine: https://optifine.net/downloads

Download OptiFine (Alt): https://optifined.net/downloads

Download Shader Packs: https://optifine.net/shaderPacks

Information for Forge users: https://redd.it/eb71f1

 

Documentation (latest): https://github.com/sp614x/optifine/tree/master/OptiFineDoc/doc

  • You can find older versions of the documentation inside OptiFine's .jar file by using WinRAR or 7zip.

Issue Tracker: https://github.com/sp614x/optifine/issues

AdoptOpenJDK: https://adoptopenjdk.net/index.html

  • Some technical info: The JDK includes the development kit and the runtime environment. If you're not a Java developer, you don't need the JDK, but you won't really have a problem if you download it anyway. If you wanna save space on your harddrive though (~70MB difference, if anyone cares), find the JRE Installer and download that instead: https://adoptopenjdk.net/releases.html

Jarfix: https://johann.loefflmann.net/en/software/jarfix/index.html

 

Downloading & Installing OptiFine

This will install the standalone version of OptiFine. If you want to use OptiFine with Forge, see the Forge information thread. (link in the resource section above)

  1. Run Minecraft on the version you'd like to use OptiFine on at LEAST once.

    • This is to ensure the launcher downloads all the necessary files for OptiFine to be installed.

  2. Make sure the Minecraft launcher is closed before proceeding.

    • This will save you a LOT of hassle!

  3. Download and install Java, if it is not already installed on your system.

    • Minecraft's bundled Java does NOT count.

    • Since Oracle now requires an account to download Java, we recommend using AdoptOpenJDK.

  4. Download OptiFine, and open it with Java.

    • Note that, unless you're using the "mirror" link, this will temporarily bring you to an adfly page. Do not click on anything on this page apart from the "Skip Ad" button in the top right corner.

    • If the website leads you to an empty page, disable your adblocker, and/or switch to uBlock Origin. In some rare cases, you may need to also disable your antivirus. (I know this last one sounds completely ridiculous, but this has been the solution for 2-3 different users so far. Be sure to turn it back on after downloading!)

    • Your browser will likely tell you something along the lines of "This file could harm your computer, do you want to proceed?" This is normal, and most browsers will tell you this simply because OptiFine comes as a .jar file, which is a Java executable.

    • If the file shows as a ZIP archive, or you have any other issue trying to open the OptiFine installer, try using Jarfix.

    • If you somehow still cannot install OptiFine at this point, double check that you have followed all these steps correctly. You can join our Discord for further assistance, or you can post an issue report on GitHub.

  5. Ensure the install directory points to your .minecraft folder before clicking "Install"

  6. You should now see a new "OptiFine" profile in the official Minecraft launcher.

Intense Lagging After Few Minutes of Play
u/Numerous_Vanilla_120
• Intense Lagging After Few Minutes of Play
Forge

Hello, I recently installed a mods pack called the perfect medieval modpack on curse forge.

I’ve downloaded 3 shaders: BSL, Complementary Unbounded, and Sildor’s Vibrant.

*For reference, playing without the mods but with the shaders, my fps was consistently 165, and when I played with only the mods but no shaders, I was still at a similar cap.

My specs are as follows (all desktop version): i7 13700, RTX 4060 TI 8Gb, 16Gb 4800MHz RAM dual channel (My friend, who has had success with his modpack has very similar specs)

Now I do get a high fps to begin, but the game turns very choppy after a few seconds of play. I’ve turned down the render distance, lowered the quality of graphics, even lowered shader settings, but all end up at these frame drops. I installed Optifine in the ‘mods’ folder for curseforge, and the shaders in the ‘shader packs’ unzipped.

My MC version is 1.12.2 for this modpack to work. My forge version is 14.23.5.2859

I am using Optifine 1.12.2 HD U G5, but this is also copied from my friend’s modpack, which works fine on a similar computer. I think his CPU is slightly more powerful than mine but it’s still an i7.

I’ve seen both the CPU and GPU get utilized up to 80% but never much more, so I don’t think specs are a problem. Any thoughts on what I should do?