RenderSettings.fogDensity

Description

The density of the exponential fog.

Fog density is used by Exponential and ExponentialSquared modes.

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour
{
    void Example()
    {
        // Set the fog color to be blue
        RenderSettings.fogDensity = 0.1f;

        // And enable fog
        RenderSettings.fog = true;
    }
}

See Also: RenderSettings.fogMode.