Question How to load an AssetBundle prefab (or scene) with lightmaps.

My goal is to deliver an app that rarely needs updating by having it dynamically load content (prefabs or additive scenes) from a web address.

I can easily achieve this with AssetBundles however none of the assets contain lightmaps.
It makes sense that bundled prefabs don't have lightmaps because the maps are stored with the scene so I believe now I have tried almost every possible method of bundling them together with the prefab but still no luck.

I've tried putting the maps in other separate bundles that I download before the prefab that uses them. I've even tried bundling entire scenes (but unless the scene already exists in the build list they appear as completely empty scenes anyway so I don't actually see the point in bundling scenes).
Installing the Addressables package seems like overkill to just attach a lightmap to a assetbundled prefab.
So can anyone suggest how to solve this?

 

Bundling scenes that don't exist in build should work just fine, why do you not see the point?

 

Are you suggesting that instantiating a downloaded bundled scene will include all the scenes assets including lightmaps? Mine appeared completely empty when I tried unless the original scene still existed in the project.

 

Solved it! Thanks nilsdr (for making me think twice).
It does load the entire Scene with contents and lightmaps! - if you don't make any typos

Here is working code to load the bundled scene:

Code (CSharp):

1.  
2.     IEnumerator LoadScene()
3.     {
4.         www = UnityWebRequestAssetBundle.GetAssetBundle("https://website.com/assets/test.unity3d");
5.  
6.         yield return www.SendWebRequest();
7.  
8.         if (www.result != UnityWebRequest.Result.Success)
9.         {
10.             Debug.Log(www.error);
11.             yield break;
12.         }
13.         else
14.         {
15.             Debug.Log("Success connecting to website. Start loading scene model");
16.  
17.             var bundle = DownloadHandlerAssetBundle.GetContent(www);
18.  
19.             string[] scenePath = bundle.GetAllScenePaths();
20.             AsyncOperation scene = SceneManager.LoadSceneAsync(scenePath[0], LoadSceneMode.Additive);
21.  
22.             //Wait until we are done loading the scene
23.             while (scene.progress < 0.9f)
24.             {
25.                 Debug.Log("Loading scene " + " [][] Progress: " + scene.progress);
26.                 yield return null;
27.             }
28.             bundle.Unload(false);
29.         }
30.     }
31.  

Lightmaps in Prefabs is another question, but using additive scenes is perfect for me.