time setFog [fogValue, fogDecay, fogBase]

Changes the fog smoothly over the given time (in seconds).
A time of zero means there will be an immediate change.
A fog value of zero is minimum fog and a fog value of one is maximum fog.

• fogValue: Number - value for fog at base level


• fogDecay: Number - decay of fog density with altitude


• fogBase: Number - base altitude of fog (in meters)