A multiplier for the speed at which SceneKit runs the particle simulation. Animatable.
- iOS 8.0+
- macOS 10.10+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 3.0+
Use this property to speed up or slow down the overall behavior of a particle system without changing the many individual properties (such as
particle) that affect the motion of particles.
The default value is 1.0. Lower values slow down the effect; higher values make the effect run faster.
You can animate changes to this property’s value. See Animating SceneKit Content.