NetworkManager tries to sync dynamically created scene

Hello everyone !

I’m just starting to try and implement netcode for my tiny simple game and I’m encountering an issue with a dynamically created scene in the active one (used to make physics predictions).

When a script dynamically creates a scene alongside the active one, the NetworkManager will try to sync it on the server side when a new client connects.

Here is an example with a script attached to an empty object on my active scene (the one that fires when the server is started) :

        void Start()
        {
            Physics2D.simulationMode = SimulationMode2D.Script;

            currentScene = SceneManager.GetActiveScene();
            currentPhysicsScene = currentScene.GetPhysicsScene2D();

            CreateSceneParameters parameters = new CreateSceneParameters(LocalPhysicsMode.Physics2D);
            predictionScene = SceneManager.CreateScene("Prediction", parameters);
            predictionPhysicsScene = predictionScene.GetPhysicsScene2D();

            copyAllObstacles();
        }

I don’t know how I can not sync this scene with the current lib. One easy fix could be to check the path length in \Runtime\SceneManagement\NetworkSceneManager.cs line 1550 like this:

if (scene.path.Length == 0 || ExcludeSceneFromSychronization != null && !ExcludeSceneFromSychronization(scene))
 {
     continue;
 }

I assume that the default behavior would be not wanting to sync the dynamically created scenes.

[Sladix]

Yep, that works ! Fortunately I only have one dummy scene so that workaround works like a charm, thanks !

[NoelStephensUnity]

Glad to hear it! 👍 I went ahead and added a small section in the NetworkSceneManager documentation about how to do this and will go ahead and close this issue out.