Loading and Unloading scenes

I've recently switched from the old, obsolete, Application.LoadLevel to SceneManager.LoadScene.
Now, while the old method loaded a new scene without any problems, SceneManager.LoadScene just loads the new scene on top of the old one.

So I went and looked if there was a way to unload the current scene and found UnloadSceneAsync, which seems to be what I need, except it does absolutely nothing when called.

Code (CSharp):

1.  
2.         if (Input.GetKeyDown(KeyCode.Escape)){
3.             SceneManager.LoadScene ("mainScene", LoadSceneMode.Additive);
4.             SceneManager.UnloadSceneAsync ("machine");
5.     }

This is the bit of my code that is supposed to load and unload, it doesn't seem to be wrong.

Any idea what's going on? How do I unload my old scene?

 

if you load a scene the other scene will unload automaticly

 

Not for me...

 

Try this one out:

Application.LoadLevel("Area 2");

add Area 2 to the build settings first and it will load. According to the document I linked it destroys the old scene before loading the new one so it should hopefully solve your problem!
https://docs.unity3d.com/ScriptReference/Application.LoadLevel.html

The method is obsolete but I just tested it and it worked for me. Let me know if it works!

 

It does work but the lighting looks strange, darker than it should.
Also should I be using something that is obsolete?

 

*facepalm*

Is the scene named machine? Have you tried using the build index or the actual reference to the scene (assuming you loaded it via code)? If you grab the AsyncOperation this method returns and monitor it does it ever report completing?

 

Scene called machine exists and is in the build settings.
Neither build index (if that is the number next to the scene in the build settings) nor a reference make any difference.

I'm also not entirely sure how to use AsyncOperation

 

Yeah that was my bad for just skimming haha.

Have you tried just the normal UnloadScene function?

https://docs.unity3d.com/530/Docume...SceneManagement.SceneManager.UnloadScene.html

Add "using UnityEngine.SceneManagement" to the top of the script as well. If you don't have it already that might fix your UnloadSceneAsync.

 

I just noticed I'm using the wrong Mode to load the scene, instead of Single I'm using Addittive which is exactly what's causing the problem.

Sorry for wasting everybody's time

 

I would not say that it's an actual problem. The problem is that you need to wait until the second scene has finished loading.
In case of regular loading this means yielding a frame:

Code (CSharp):

1.     void Update ()
2.     {
3.         if (Input.GetKeyDown(KeyCode.Escape))
4.         {
5.             StartCoroutine(SceneSwitch);
6.         }
7.     }
8.  
9.     IEnumerator SceneSwitch()
10.     {
11.         SceneManager.LoadScene("mainScene", LoadSceneMode.Additive);
12.         yield return null;
13.         SceneManager.UnloadSceneAsync("machine");
14.     }

In the async case it means waiting for the async operation to be finished

Code (CSharp):

1.     void Update ()
2.     {
3.         if (Input.GetKeyDown(KeyCode.Escape))
4.         {
5.             StartCoroutine(SceneSwitch);
6.         }
7.     }
8.  
9.     IEnumerator SceneSwitch()
10.     {
11.         AsyncOperation load = SceneManager.LoadSceneAsync("mainScene", LoadSceneMode.Additive);
12.         yield return load;
13.         SceneManager.UnloadSceneAsync("machine");
14.     }

 

no thats no true