# UpdateGIMaterials

> Schedules an update of the albedo and emissive Textures of a system that contains the Terrain.

## Definition

* **Type:** Method
* **Namespace:** [UnityEngine](/engine/6000.5/script-reference/unityengine.md)
* **Assembly:** UnityEngine.TerrainModule

## UpdateGIMaterials(Terrain)

Schedules an update of the albedo and emissive Textures of a system that contains the Terrain.

```csharp
public static void UpdateGIMaterials(this Terrain terrain)
```

### Parameters

**** (\[Terrain]\(/engine/6000.5/script-reference/unityengine/terrain)): 

### Remarks

The second overload specifies a region of the Terrain that needs to be updated. This makes sure that only the systems that overlap with the specified rectangle get updated, which could help improve performance. The coordinates are specified the same way as in [TerrainData.SetAlphamaps](/engine/6000.5/script-reference/unityengine/terraindata/setalphamaps.md).

## UpdateGIMaterials(Terrain, int, int, int, int)

Schedules an update of the albedo and emissive Textures of a system that contains the Terrain.

```csharp
public static void UpdateGIMaterials(this Terrain terrain, int x, int y, int width, int height)
```

### Parameters

**** (\[Terrain]\(/engine/6000.5/script-reference/unityengine/terrain)): **** (\[int]\(https\://learn.microsoft.com/dotnet/api/system.int32)): **** (\[int]\(https\://learn.microsoft.com/dotnet/api/system.int32)): **** (\[int]\(https\://learn.microsoft.com/dotnet/api/system.int32)): **** (\[int]\(https\://learn.microsoft.com/dotnet/api/system.int32)): 

### Remarks

The second overload specifies a region of the Terrain that needs to be updated. This makes sure that only the systems that overlap with the specified rectangle get updated, which could help improve performance. The coordinates are specified the same way as in [TerrainData.SetAlphamaps](/engine/6000.5/script-reference/unityengine/terraindata/setalphamaps.md).