RenderSettings.fogDensity

説明

フォグの密度指数

Fog density is used by Exponential and ExponentialSquared modes.

using UnityEngine;
using System.Collections;

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

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

Additional resources: RenderSettings.fogMode.