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# whitePoint

The luminance level to use as the upper end of a tone mapping curve.

```
var whitePoint: CGFloat { get set }
```

## Discussion

When using a High Dynamic Range (HDR) camera, SceneKit applies a process called *tone mapping* to translate the wide range of luminance values in the visible scene to the narrower range of brightness values that can be shown on a display. SceneKit determines a tone mapping curve from the [`minimumExposure`](/documentation/SceneKit/SCNCamera/minimumExposure), [`maximumExposure`](/documentation/SceneKit/SCNCamera/maximumExposure), [`exposureOffset`](/documentation/SceneKit/SCNCamera/exposureOffset), and [`whitePoint`](/documentation/SceneKit/SCNCamera/whitePoint) properties, along with a measure of scene luminance.

The default value is `1.0`. By setting this property to a higher or lower value, you can produce more gradual or more abrupt transitions between shadows and highlights.

This property has no effect if the [`wantsHDR`](/documentation/SceneKit/SCNCamera/wantsHDR) value is <doc://com.apple.documentation/documentation/Swift/false>.

---

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