Best way to switch between multiple sets of lightmaps

I have some code that you might be able to adapt to your needs. I wrote a coroutine that downloads an assetbundle that contains lightmaps. The problem I had was lightmaps are scene file specific, so you gotta do some janitorial work to get the mess working when importing your own scenery to the same scene.

 AssetBundle bundle = www.assetBundle;
     GameObject myBackground;
     //print ("originalName " + originalName);
     if (bundle) {
         GameObject background = bundle.Load (originalName, typeof(GameObject)) as GameObject;
     
         //print (background.name);
         myBackground = Instantiate (background, background.transform.position, background.transform.rotation) as GameObject;
         myBackground.SetActive (true);
         myBackground.name = background.name;
 
         if (myBackground.GetComponent<backgroundBehavior> ().LightMapStorage.Length > 0) {
             //print ("got this far");
             int idx = 0; 

             Object[] obj = www.assetBundle.LoadAll ();
             Texture2D[] LMfarTexture;
             Texture2D[] LMnearTexture;
             int numberOfPairs = obj.Length;
     
             LMfarTexture = new Texture2D[numberOfPairs];
     
             foreach (Object o in obj) {
                 if (o.GetType () == typeof(Texture2D)) {
                     if (o.name.Contains ("Lightmap")) {
                         LMfarTexture [idx] = o as Texture2D;
                         idx++;
                     }
                 }
             }
     
             int i = 0;
             LightmapData lmData = new LightmapData ();
             LightmapData[] lmDataSet = new LightmapData [numberOfPairs];
             foreach (Texture texture in LMfarTexture) {
                 lmData = new LightmapData ();
                 lmData.lightmapFar = LMfarTexture [i];
                 lmDataSet [i] = lmData;
                 i++;
             }

         
     
             LightmapSettings.lightmapsMode = LightmapsMode.Single;
             LightmapSettings.lightmaps = lmDataSet;
         
         }

I needed to make a behavior script to deal with the fact that unity was not voluntarily saving my lightmaps as I exported the assetbundle. The "backgroundBehavior" script looks like this:

/////////////// using UnityEngine; using System.Collections;

public class backgroundBehavior : MonoBehaviour { public bool useSunShafts = false; public Material mySkyBoxMaterial; public Vector3 myPosition; public Texture2D[] LightMapStorage;//just a var where we force Unity to save our Lightmaps when we make an asset bundle public bool usingSpaceConstructionSet = false; public Color ambientColor = Color.black;

 // Use this for initialization
 void Start ()
 {
 
 }
 
 void OnEnable ()
 {
     

     
     RenderSettings.ambientLight = ambientColor;
     if (useSunShafts) {
         Camera.main.gameObject.GetComponent<SunShafts> ().enabled = true;    
         Camera.main.gameObject.GetComponent<SunShafts> ().sunTransform = GameObject.Find ("Sun").transform;
     } else {
         if (Camera.main.gameObject.GetComponent<SunShafts> () != null) {
             Camera.main.gameObject.GetComponent<SunShafts> ().enabled = false;
         }
     }
     
     if (usingSpaceConstructionSet) {
         Camera.main.clearFlags = CameraClearFlags.Depth;
         
     } else {
         Camera.main.clearFlags = CameraClearFlags.Skybox;
         RenderSettings.skybox = mySkyBoxMaterial;
     }
     
     
     
     
 }

}

I decided to use single light maps instead of dual. If you want dual you'll have to figure it out on your own as I've never done anything with it.

I hope this helps because this problem had me on a 6 hour google hunt.