The relative duration of automatically animated exposure transitions from bright to dark areas.
- iOS 10.0+
- macOS 10.12+
- tvOS 10.0+
- watchOS 3.0+
When using a High Dynamic Range (HDR) camera, SceneKit applies a process called tone mapping to translate the wide range of luminance values in the visible scene to the narrower range of brightness values that can be shown on a display. When the
wants property is enabled, SceneKit automatically adjusts the tone mapping curve based on the average luminance currently visible to the camera, and creates automatic transitions between exposure levels.
SceneKit automatically determines the overall duration of exposure-level animations based on the values of this property and the
exposure property. The default value is
0, resulting in darkening animations that are slightly faster than brighting animations.