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# extent

The area around the anchor’s position that contains the texture.

```
var extent: simd_float3 { get }
```

## Discussion

Rendering reflective objects may involve projecting the [`environmentTexture`](/documentation/ARKit/AREnvironmentProbeAnchor/environmentTexture) onto a proxy geometry centered on the anchor’s position, then sampling from the projected texture.

An environment probe anchor may have an infinite extent, which indicates that its texture is a global lighting environment, or a finite extent, which indicates that its texture represents the local lighting conditions in a specific area of the scene.

---

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