# SCNBox A six-sided polyhedron geometry whose faces are all rectangles, optionally with rounded edges and corners. ``` class SCNBox ``` ## Overview  Define the shape of the box in the x-, y-, and z-axis dimensions of its local coordinate space by setting its [`width`](/documentation/SceneKit/SCNBox/width), [`height`](/documentation/SceneKit/SCNBox/height), and [`length`](/documentation/SceneKit/SCNBox/length) properties. Add rounded edges and corners to a box with its [`chamferRadius`](/documentation/SceneKit/SCNBox/chamferRadius) property. To position and orient a box in a scene, attach it to the [`geometry`](/documentation/SceneKit/SCNNode/geometry) property of an [`SCNNode`](/documentation/SceneKit/SCNNode) object. Control the level of detail with the [`widthSegmentCount`](/documentation/SceneKit/SCNBox/widthSegmentCount), [`heightSegmentCount`](/documentation/SceneKit/SCNBox/heightSegmentCount), [`lengthSegmentCount`](/documentation/SceneKit/SCNBox/lengthSegmentCount), and [`chamferSegmentCount`](/documentation/SceneKit/SCNBox/chamferSegmentCount) properties. A higher segment count produces more vertices, which can improve rendering quality for certain lighting models or custom shader effects, but at a cost to rendering performance. You can assign up to six [`SCNMaterial`](/documentation/SceneKit/SCNMaterial) instances to a box—one for each side—with its [`materials`](/documentation/SceneKit/SCNGeometry/materials) property. The [`SCNBox`](/documentation/SceneKit/SCNBox) class automatically creates [`SCNGeometryElement`](/documentation/SceneKit/SCNGeometryElement) objects as needed to handle the number of materials. ## Topics ### Creating a Box [`init(width:height:length:chamferRadius:)`](/documentation/SceneKit/SCNBox/init(width:height:length:chamferRadius:)) Creates a box geometry with the specified width, height, length, and chamfer radius. ### Adjusting a Box’s Dimensions [`width`](/documentation/SceneKit/SCNBox/width) The extent of the box along its x-axis. Animatable. [`height`](/documentation/SceneKit/SCNBox/height) The extent of the box along its y-axis. Animatable. [`length`](/documentation/SceneKit/SCNBox/length) The extent of the box along its z-axis. Animatable. ### Configuring Box Properties [`widthSegmentCount`](/documentation/SceneKit/SCNBox/widthSegmentCount) The number of subdivisions in each face of the box along its x-axis. Animatable. [`heightSegmentCount`](/documentation/SceneKit/SCNBox/heightSegmentCount) The number of subdivisions in each face of the box along its y-axis. Animatable. [`lengthSegmentCount`](/documentation/SceneKit/SCNBox/lengthSegmentCount) The number of subdivisions in each face of the box along its z-axis. Animatable. ### Adding Rounded Edges and Corners [`chamferRadius`](/documentation/SceneKit/SCNBox/chamferRadius) The radius of curvature for the edges and corners of the box. Animatable. [`chamferSegmentCount`](/documentation/SceneKit/SCNBox/chamferSegmentCount) The number of line segments used to create each rounded edge of the box. Animatable. --- Copyright © 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)