# lightmapper

> Determines which backend to use for baking lightmaps in the Baked Global Illumination system. (Editor only).

## Definition

* **Type:** Property
* **Namespace:** [UnityEngine](/engine/6000.6/script-reference/unityengine.md)
* **Assembly:** UnityEngine.CoreModule

```csharp
public LightingSettings.Lightmapper lightmapper { get; set; }
```

### Remarks

The default value is `Progressive GPU`.

When Unity serializes this `LightingSettings` object as a [Lighting Settings Asset](/engine/6000.6/manual/lighting-overview/lighting-reference/class-lighting-settings.md), this property corresponds to the **Lightmapper** property in the Lighting Settings Asset Inspector.

Additional Resources: [Lighting Settings Asset](/engine/6000.6/manual/lighting-overview/lighting-reference/class-lighting-settings.md), [LightingSettings.Lightmapper](/engine/6000.6/script-reference/unityengine/lightingsettings/lightmapper.md).