The VerticalFalloffExponent property of the GradientFogController class defines the rate at which the fog density decreases vertically. This property is a float value that influences how quickly the fog fades out as it moves away from the specified StartHeight and EndHeight. A higher value results in a steeper falloff, meaning the fog will dissipate more quickly with height.

To use the VerticalFalloffExponent property, you can set it to a desired float value that represents the steepness of the vertical fog falloff. This property is useful for creating realistic atmospheric effects where fog density changes with altitude.

Example usage:

GradientFogController fogController = new GradientFogController();
fogController.VerticalFalloffExponent = 2.0f; // Sets a steeper vertical falloff