LightMapToggle

using UnityEngine;
using System.Collections;

[System.Serializable]
public class TimeSettings {
	public string lightMap;
	public Material skyBoxMat;
	public bool fogToggle;
	public Color ambientLight;
}

public class StartUpSettings : MonoBehaviour {
	public TimeSettings day;
	public TimeSettings night;
	private TimeSettings currentTimeSettings;
	private bool isDay;

	void Start () {
    	Screen.lockCursor = true;
		isDay = true;
		SetLightMaps ();
	}

	void Update () {
		if (Input.GetKeyDown ("q")) {
			SetLightMaps ();
		}
	}

	void SwapLightMaps () {
	}

	void  SetLightMaps () {
		//	Set the CurrentTimeSettings
		currentTimeSettings = (isDay) ? day : night;

		//	Set the RenderSettings to match the CurrentTimeSettings
		RenderSettings.skybox = currentTimeSettings.skyBoxMat;
		RenderSettings.fog = currentTimeSettings.fogToggle;
		RenderSettings.ambientLight = currentTimeSettings.ambientLight;

		//	Load the light maps from the Resources folder
		//	Pass in the path to the location of the lightmaps, starting below the "Resources" folder.
		LightmapData[] lightMapArray = LightmapSettings.lightmaps;
		for (int i = 0; i < lightMapArray.Length; i++) {
			LightmapData mapData = new LightmapData();
			mapData.lightmapFar = Resources.Load(currentTimeSettings.lightMap + "/LightmapColor-" + i.ToString(), typeof (Texture2D)) as Texture2D;
			mapData.lightmapNear = Resources.Load(currentTimeSettings.lightMap + "/LightmapScale-" + i.ToString(), typeof (Texture2D)) as Texture2D;
			lightMapArray[i] = mapData;
		}
		LightmapSettings.lightmaps = lightMapArray;
		isDay = !isDay;
	}
}