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# SCNTransparencyMode

The modes SceneKit uses to calculate the opacity of pixels rendered with a material, used by the [`transparencyMode`](/documentation/SceneKit/SCNMaterial/transparencyMode) property.

```
enum SCNTransparencyMode
```

## Topics

### Constants

[`SCNTransparencyMode.aOne`](/documentation/SceneKit/SCNTransparencyMode/aOne)

SceneKit derives transparency information from the alpha channel of colors. The value `1.0` is opaque.

[`SCNTransparencyMode.rgbZero`](/documentation/SceneKit/SCNTransparencyMode/rgbZero)

SceneKit derives transparency information from the luminance of colors. The value `0.0` is opaque.


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