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# iosurfacePlane

The number of a plane within the underlying surface instance for the texture, if applicable.

```
var iosurfacePlane: Int { get }
```

## Discussion

The plane number applies to the [`iosurfacePlane`](/documentation/Metal/MTLTexture/iosurfacePlane) property when it
isn’t `nil`.
The property’s value defaults to `0` for textures that don’t come from an
<doc://com.apple.documentation/documentation/IOSurface/IOSurface> instance.

---

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