# horizonElevation The angle, in radians relative to center, below which to render the ground color. ``` var horizonElevation: Float { get set } ``` ## Discussion By default, Model I/O renders an infinite sky above and below. If you set the [`groundColor`](/documentation/ModelIO/MDLSkyCubeTexture/groundColor) property, Model I/O renders a solid color for all areas of the cube texture below this elevation. An elevation of `0.0` renders a horizon at the center elevation of the sky cube; negative values lead to a lower horizon and positive values to a higher horizon. --- 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)