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> Unreal Engine API Reference > Runtime > Engine > Materials > UMaterial > StateId

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StateId

Guid that uniquely identifies this material.

Windows

MacOS

Linux

Syntax

FGuid StateId

Remarks

Guid that uniquely identifies this material. Any changes to the state of the material that do not appear separately in the shadermap DDC keys must cause this guid to be regenerated! For example, a modification to the Expressions array. Code changes that cause the guid to be regenerated on load should be avoided, as that requires a resave of the content to stop recompiling every load.

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