Sodium / Iris: Not Enough Space in Destination Buffer Crash

What it looks like in the log

java.lang.IllegalArgumentException: Not enough space in destination buffer (writeOffset + bytes > bufferSize)

How to fix it

1. Update both Sodium and Iris to the latest standalone versions available for your Minecraft version, and remove any old custom-bundled `sodium-fabric-...+IRIS` JARs from your `mods` folder.
2. If you are playing on an older 1.16.5 modpack and cannot update Sodium, open `Options -> Video Settings -> Advanced` and change **Chunk Renderer** from `Multidraw (GL 4.3)` to `Oneshot (GL 3.0)` to bypass the buggy buffer arena.
3. If you are using a Forge port of older Sodium (such as Magnesium or Rubidium) and encounter the same trace, update to Embeddium or apply the same Chunk Renderer setting change.
4. Lower your Render Distance by 2–4 chunks if the stuttering persists around massive block-updating farms (like large sugarcane, bamboo, or flying-machine farms).

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