Version: 5.5
public static AsyncOperation LoadSceneAsync (string sceneName, SceneManagement.LoadSceneMode mode= LoadSceneMode.Single);
public static AsyncOperation LoadSceneAsync (int sceneBuildIndex, SceneManagement.LoadSceneMode mode= LoadSceneMode.Single);

Parameters

sceneName Name or path of the scene to load.
sceneBuildIndex Index of the scene in the Build Settings to load.
mode If LoadSceneMode.Single then all current scenes will be unloaded before loading.

Returns

AsyncOperation Use the AsyncOperation to determine if the operation has completed.

Description

Loads the scene asynchronously in the background.

The given scene name can either be the full scene path, the path shown in the Build Settings window or just the scene name. If only the scene name is given this will load the first scene in the list that matches. If you have multiple scenes with same name but different paths, you should use the full scene path. Examples of supported formats: "Assets/Scenes/Scene1.unity" "Scenes/Scene1" "Scene1"

Note that this is case insensitive.