static function OpenSceneAdditive (path : String) : void

Description

Opens the scene at path additively.

All paths are relative to the project folder. Like: "Assets/MyScenes/MyScene.unity"

// Simple script that lets you load the contents of a selected scene 
// to your current scene.

@MenuItem("Example/Load Scene Additive") 
static function Apply () { 
    var strScenePath : String = AssetDatabase.GetAssetPath(Selection.activeObject); 
    if (strScenePath == null || !strScenePath.Contains(".unity"))  {
        EditorUtility.DisplayDialog("Select Scene", "You Must Select a Scene!", "Ok");
        EditorApplication.Beep(); 
        return; 
    } 
    Debug.Log("Opening " + strScenePath + " additively"); 
    EditorApplication.OpenSceneAdditive(strScenePath); 
}