LoadSceneAsync progress does not work Unity 2018.2. Broken?

My code:

Code (CSharp):

1.  
2. private IEnumerator LoadMainScene()
3.     {
4.  
5.         AsyncOperation async = SceneManager.LoadSceneAsync(1);
6.         async.allowSceneActivation = true;
7.  
8.         while (!async.isDone)
9.         {
10.             float progress = async.progress / 0.9f;
11.  
12.             MUIManager.instance.LoadScreenProgressBar.value = progress;
13.  
14.             MUIManager.instance.LoadScreenPercentText.text = (progress * 100).ToString();
15.             yield return null;
16.         }
17.  
18.  
19.     }
20.  

The scene is very big, but there is no smooth loading. Async.progress return 0, 0.9 and then immediately 1.
Visually it turns out to see only 0 and 100. No smooth loading progress bar. Am I doing something wrong or is it broken?

 

It's a known issue and has been discussed quite often in the forum.

Scene Async Load Is Not Async
https://issuetracker.unity3d.com/issues/async-load-is-not-async

SceneManager.LoadSceneAsync freezes the editor when loading scenes with a lot of GameObjects
https://issuetracker.unity3d.com/is...-the-loading-scenes-with-a-lot-of-gameobjects

Some developers, who have access to Unity's engine source code, were able to make changes that allowed them to fix/workaround this issue, like Playdead for example.

Spoiler: Unite 2016 - Tools, Tricks and Technologies for Reaching Stutter Free 60 FPS in INSIDE

 

So I can't even get smooth download progress? I put up with the freezing scene. I wanted at least the progress of loading the scene (

 

2019 and still loading bar doesnt go smooth? goes from 0 to full

 

Are you testing in the editor?

 

Yes

 

Test it in a build then. While in the editor in play mode, Unity appears to block the main thread until the async scene load completes.

https://issuetracker.unity3d.com/is...-the-loading-scenes-with-a-lot-of-gameobjects

 

I'm getting issues with this in 2018.4.9f1 still in 2020. The progress stays at 0 forever and isDone is true immediately. Any fixes for this or is it working in new versions?

 

Hey all, was running into a stuttering progress bar with my builds on mobile, and figured out the problem.

At least for me, it turns out that the problem had to do with audio clips. Audio clips that are flagged to 'Decompress on Load', when being loaded asynchronously with a scene, not only take a long time to load, they also cause problems with the operation's progress property.

The fix was changing all of my audio clips to 'Compressed in Memory'. It fixed my loading bar problems, and also took my scene loading time from 15-23 seconds to about 3 seconds.

Hopefully this helps someone!