using UnityEngine; using System.Collections; public class GameManager : MonoBehaviour { public GameObject player; void Start () { Scene currentScene = SceneManager.GetActiveScene(); SceneManager.LoadSceneAsync(currentScene.buildIndex, LoadSceneMode.Additive); Scene newScene = SceneManager.GetSceneAt(1); SceneManager.SetActiveScene(newScene); SceneManager.MoveGameObjectToScene(player, newScene); newScene.AddEntity(player); } }In this example, we are adding a player character to a new scene that is being loaded asynchronously. We first get the current scene and load it additively. Then we get the new scene and set it as the active scene. Finally, we move the player character to the new scene and add it to the scene using the Scene.AddEntity() method. The package library for this method would likely be a game engine or graphics library such as Unity or Unreal Engine.