# OnShaderChanged()

> A callback that is invoked when a Material's Shader is changed in the Inspector.

## Definition

* **Type:** Method
* **Namespace:** [UnityEditor](/engine/6000.6/script-reference/unityeditor.md)
* **Assembly:** UnityEditor.CoreModule

```csharp
protected virtual void OnShaderChanged()
```

### Remarks

This callback is invoked as the result of selecting a new Shader from the pop-up menu in the Inspector, or as the result of undoing or redoing actions that involved changing the Shader. It is called after a new Shader has been assigned to the Material currently in the Inspector, but before all Inspectors have been repainted (updated visually in the Editor).