<!--
{
  "availability" : [
    "iOS: 8.0.0 - 26.0.0",
    "iPadOS: 8.0.0 - 26.0.0",
    "macCatalyst: 13.1.0 - 26.0.0",
    "macOS: 10.8.0 - 26.0.0",
    "tvOS: 9.0.0 - 26.0.0",
    "visionOS: 1.0.0 - 26.0.0",
    "watchOS: 3.0.0 - 26.0.0"
  ],
  "documentType" : "symbol",
  "framework" : "SceneKit",
  "identifier" : "/documentation/SceneKit/SCNPlane/cornerRadius",
  "metadataVersion" : "0.1.0",
  "role" : "Instance Property",
  "symbol" : {
    "kind" : "Instance Property",
    "modules" : [
      "SceneKit"
    ],
    "preciseIdentifier" : "c:objc(cs)SCNPlane(py)cornerRadius"
  },
  "title" : "cornerRadius"
}
-->

# cornerRadius

The radius of curvature for the plane’s corners. Animatable.

```
var cornerRadius: CGFloat { get set }
```

## Discussion

The minimum (and default) corner radius is `0.0`, specifying square corners. Set this property to a nonzero value to add rounded corners to the plane. Setting a corner radius of less than zero creates an empty geometry.

The maximum corner radius is half the plane’s smaller dimension. For example, if a plane’s [`width`](/documentation/SceneKit/SCNPlane/width) and [`height`](/documentation/SceneKit/SCNPlane/height) properties are both `10.0`, setting a corner radius of `5.0` gives the plane a circular shape, and increasing the corner radius beyond `5.0` has no effect. If a plane has width `10.0` and height `5.0`, the maximum corner radius is `2.5`, creating a rectangular shape with circular endcaps.

You can animate changes to this property’s value. See [Animating SceneKit Content](/documentation/SceneKit/animating-scenekit-content).

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)