# DiffuseAlphaChannel

> Smoothness value comes from the alpha channel of TerrainLayer.diffuseTexture.

## Definition

* **Type:** Field
* **Namespace:** [UnityEngine](/engine/6000.0/script-reference/unityengine.md)
* **Assembly:** UnityEngine.TerrainModule

```csharp
DiffuseAlphaChannel = 1
```