The color of the simulated ground.
- iOS 9.0+
- macOS 10.11+
- Mac Catalyst 13.0+
- tvOS 9.0+
- Model I/O
By default, this property’s value is
nil, causing Model I/O to render an infinite sky above and below. If you set this property to a color, Model I/O renders a solid color for all areas of the cube texture below the level specified in the