Scene Transitions

A Scene Transition is an orchestration of load and unload operations to effectively transition between scenes, with or without an intermediate scene. For example, if you want to transition from scene A to scene B you could:

1. Load the scene B.
2. Unload the scene A.

That's only two operations, but if you want to have a loading screen as well you could:

1. Load the loading scene.
2. Load the scene B.
3. Unload the scene A.
4. Unload the loading scene.

That's four operations now. The TransitionAsync method lets you provide the scene (or scenes) you want to transition to from the current active scene and if you want an intermediate scene (loading scene for example).

Intermediate Loading Scene

To create a Loading Scene, you need to use the Loading Components. When performing a Scene Transition, the CoreSceneManager looks for a LoadingBehavior component in the intermediate scene, and if it exists it is notified with the loading progress.

The WaitForScriptedStart and WaitForScriptedEnd fields in the LoadingBehavior control if the loading scene will have an animation to start and/or end the transition. Effectively, this delays the start or the end of the Scene Transition operation to display a visual feedback such as a fade in/out.

When the TransitionAsync method is awaited, it will wait until the entire transition has been completed and the loading scene has been unloaded. If you wish to execute an action exactly when the target scene is loaded, you can either rely on that scene's Awake() calls or subscribe to the SceneLoaded event from the CoreSceneManager or AdvancedSceneManager.