Mod conflicts

Iris Shaders Crash in FullyBufferedMultiBufferSource (Null RenderLayer with ETF/EMF)

What the log looks like

java\.lang\.NullPointerException: Cannot invoke "net\.minecraft\.class_1921\.method_23516\(\)" because "<local3>" is null
java\.lang\.NullPointerException: Cannot invoke "net\.minecraft\.class_1921\.method_23033\(\)" because "<parameter1>" is null

How to fix it

  1. Update Entity Texture Features (ETF) and Entity Model Features (EMF) to their latest versions for your Minecraft release, as ETF 5.0 had a known null render layer bug with Iris.
  2. Update Iris Shaders and Sodium to the newest compatible releases for your Minecraft version (for example, Iris 1.6.17+ or 1.7+ on 1.20.1/1.20.2).
  3. If you use Xaero's Minimap alongside ETF/EMF and still crash when entities appear nearby, open Minimap Settings -> Entity Radar Settings and switch Entity Icon rendering to simple/vanilla icons or disable custom model rendering on radar.
  4. If the crash persists after updating, temporarily remove entity_texture_features and entity_model_features from your mods folder or disable custom entity resource packs (such as Fresh Animations) to confirm the conflict is resolved.
LoadersFabric, Quilt
SeverityStops the game
CategoryMod conflicts

Check your own log

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