OnPreRender is called before a camera starts rendering the scene.

This message is sent to all scripts attached to the camera.

Note that if you change camera's viewing parameters (e.g. fieldOfView) here, they will only take effect the next frame. Do that in OnPreCull instead.

	// This script lets you enable/disable fog per camera.
	// by enabling or disabling the script in the title of the inspector
	// you can turn fog on or off per camera.
	private var revertFogState = false;
	
	function OnPreRender () {
		revertFogState = RenderSettings.fog;
		RenderSettings.fog = enabled;
	}
	
	function OnPostRender () {
		RenderSettings.fog = revertFogState;
	}

using UnityEngine;
using System.Collections;

public class Example : MonoBehaviour {
    private bool revertFogState = false;
    void OnPreRender() {
        revertFogState = RenderSettings.fog;
        RenderSettings.fog = enabled;
    }
    void OnPostRender() {
        RenderSettings.fog = revertFogState;
    }
}

import UnityEngine
import System.Collections

public class Example(MonoBehaviour):

	private revertFogState as bool = false

	def OnPreRender() as void:
		revertFogState = RenderSettings.fog
		RenderSettings.fog = enabled

	def OnPostRender() as void:
		RenderSettings.fog = revertFogState