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# ultraDark

An effect that dims passthrough video more than
[`dark`](/documentation/SwiftUI/SurroundingsEffect/dark)

```
static var ultraDark: SurroundingsEffect { get }
```

## Discussion

Use this value with the [`preferredSurroundingsEffect(_:)`](/documentation/SwiftUI/View/preferredSurroundingsEffect(_:)) view
modifier when you want to dim passthrough video while displaying a
particular view. Doing so helps to draw attention to your app’s content
while still enabling people to remain aware of their surroundings.
This effect will only be applied while an immersive space is opened.

---

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