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# isBlackPassEnabled

A Boolean value that determines whether SceneKit renders particles in black before rendering the particle image.

```
var isBlackPassEnabled: Bool { get set }
```

## Discussion

Set this property to <doc://com.apple.documentation/documentation/Swift/true> to enhance visual contrast when using additive blending. The default value is <doc://com.apple.documentation/documentation/Swift/false>.

> Important:
> Because a black pass requires rendering the entire particle system twice, enabling this option can severely affect rendering performance.

---

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