Resource packs

Iris Shaders Crash: IndexOutOfBoundsException: 12 in ExtendedShader

What it looks like in the log

java.lang.IndexOutOfBoundsException: 12

How to fix it

  1. Close Minecraft, open your instance folder, and edit `config/iris.properties` in a plain text editor.
  2. Change `enableShaders=true` to `enableShaders=false` (or delete the pack name after `shaderPack=`) and save the file so you can join worlds without crashing.
  3. Delete the incompatible shader pack (such as LS RenderPearl) from your `shaderpacks` folder and replace it with a shader pack explicitly made for Java Edition Iris.
  4. Update both Iris and Sodium to the latest release built for your exact Minecraft version before turning shaders back on in Video Settings.
LoadersFabric, Quilt
SeverityStops the game
CategoryResource packs

Check your own logDownload iris on 9Minecraft

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