An adjustment factor to apply to the overall visual contrast of the rendered scene.
- iOS 10.0+
- macOS 10.12+
- tvOS 10.0+
- watchOS 3.0+
A value of 0.0 (the default) leaves the rendered scene unchanged. Positive values increase contrast between bright and dark areas, and negative values reduce contrast, shifting the rendered scene towards a uniform gray.
To enable this behavior, you must first enable the