---
title: "I'm using Unity. Why do I get a warning when enabling \"Multipack\"?"
description: "\"Auto multipack\" is not supported by Unity and will cause broken sprite references. Use \"Manual multipack\" instead."
canonical: "https://www.codeandweb.com/texturepacker/knowledgebase/unity-multipack"
product: "texturepacker"
source: "html"
---

# I'm using Unity. Why do I get a warning when enabling "Multipack"?

Unity's sprite sheet import API does not support Multipack, meaning each sprite sheet is imported independently. If a sprite that’s already used in Unity moves to a different sheet, it will result in a broken sprite reference in your Unity project!

**Auto Multipack** automatically distributes sprites across multiple sheets, trying to optimize space. Each time you add/remove/change a sprite, the packer layout changes, and other existing sprites might be shifted between sheets, causing **broken sprite references**. This is why a warning appears when enabling it.

**Manual Multipack** lets you assign sprites to specific sheets, preventing automatic movement. This is the **recommended mode** for Unity users. If you manually move a sprite to another sheet, be sure to update all related references in your Unity project!

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