---
title: bloomThreshold
framework: scenekit
role: symbol
role_heading: Instance Property
path: scenekit/scncamera/bloomthreshold
---

# bloomThreshold

The brightness threshold at which to apply a bloom effect to highlights in the rendered scene. Animatable.

## Declaration

```swift
var bloomThreshold: CGFloat { get set }
```

## Discussion

Discussion A bloom effect adds a soft glow to highlights (areas of bright color) in the rendered scene, simulating the way bright highlights appear to the human eye or a physical camera in a real-world scene. This property controls the brightness level required to trigger the bloom effect; lower values apply the effect to more of the scene, and higher values apply the effect only to the brightest white areas. The default value is 1.0. You can animate changes to this property’s value. See Animating SceneKit Content. To enable this behavior, you must first enable the wantsHDR setting.

## See Also

### Adding Stylistic Visual Effects

- [bloomIntensity](scenekit/scncamera/bloomintensity.md)
- [bloomBlurRadius](scenekit/scncamera/bloomblurradius.md)
- [colorFringeIntensity](scenekit/scncamera/colorfringeintensity.md)
- [colorFringeStrength](scenekit/scncamera/colorfringestrength.md)
- [vignettingIntensity](scenekit/scncamera/vignettingintensity.md)
- [vignettingPower](scenekit/scncamera/vignettingpower.md)