# paperWhiteNits

> The base luminance of a white paper surface in nits or candela per square meter (cd/m2).

## Definition

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

```csharp
public float paperWhiteNits { get; set; }
```

### Remarks

This value is used if [HDROutputSettings.automaticHDRTonemapping](/engine/6000.6/script-reference/unityengine/hdroutputsettings/automatichdrtonemapping.md) is true. The higher this value, the brighter the resulting image appears on the HDR display.

Unity only uses this value if [HDROutputSettings.automaticHDRTonemapping](/engine/6000.6/script-reference/unityengine/hdroutputsettings/automatichdrtonemapping.md) is true and HDR is active on the display.

Accessing this member results in an exception if HDR is not available on the display. Use [HDROutputSettings.available](/engine/6000.6/script-reference/unityengine/hdroutputsettings/available.md) for the display to check that HDR is available.