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# extendedDynamicRangeHeadroom

The amount of headroom available for extended dynamic range content.

```
var extendedDynamicRangeHeadroom: Float { get set }
```

## Discussion

When EDR output is enabled using [`extendedDynamicRangeOutput`](/documentation/RealityKit/RealityRenderer/extendedDynamicRangeOutput), standard dynamic range
values output by this [`RealityRenderer`](/documentation/RealityKit/RealityRenderer) will be scaled such that there’s some *headroom*
to display extended range values.

This value is in the range `[1.0-16.0]`. The default value is `2.0`.

---

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