An offset for modulating ambient occlusion effects.
- iOS 11.0+
- macOS 10.13+
- Mac Catalyst 13.0+
- tvOS 11.0+
- watchOS 4.0+
Ambient occlusion is an effect that improves material shading by calculating the amounts of ambient light that reach various parts of a surface, creating shadows on parts of a geometry where incoming light is obscured by other parts of the geometry. (You can provide pre-rendered ambient occlusion effects for a material using its
ambient property.) Screen-space ambient occlusion (SSAO) provides a real-time approximation of this effect for the entire scene viewed through the camera.
screen value is used in an intermediate stage of calculating the SSAO effect, and measures a distance in scene units. Increasing or decreasing this value from its default of 0.03 can help to offset unrealistic effects produced by changing other SSAO settings.