Mod conflicts

Iris Crash: Missing elements in vertex: mc_midTexCoord, at_tangent

What the log looks like

java\.lang\.IllegalStateException: Missing elements in vertex: mc_midTexCoord, at_tangent

How to fix it

  1. Look at the lines directly below `BufferBuilder` in your crash log to identify the conflicting rendering mod, which is almost always ImmediatelyFast (`net.raphimc.immediatelyfast`) or Essential (`gg.essential`).
  2. Update Iris, Sodium, and ImmediatelyFast (or Essential) so every mod matches your exact Minecraft patch version rather than mixing builds across minor updates.
  3. If `immediatelyfast` is in the stack trace and updating does not stop the crash when pausing or opening your inventory, edit `config/immediatelyfast.json` to disable HUD/GUI batching, or remove ImmediatelyFast while using shaders.
  4. If `gg.essential` is in the stack trace, relaunch the game (a warm shader cache often prevents the initialization race condition) or disable Essential 3D cosmetics while shaderpacks are enabled.
LoadersFabric, Quilt, Neoforge, Forge
SeverityStops the game
CategoryMod conflicts

Check your own log

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