항상 게임이 있는 마운트 화면을 만들고 싶어요.

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.SceneManagement;

public class LoadingScene : MonoBehaviour {

    private AsyncOperation async;
    public GameObject LoadingUi;
    public Slider Slider;

    public void LoadNextScene() {
        LoadingUi.SetActive(true);
        StartCoroutine(LoadScene());
    }

    IEnumerator LoadScene() {
        async = SceneManager.LoadSceneAsync("[シーン名]");

        while (!async.isDone) {
            Slider.value = async.progress;
            yield return null;
        }
    }
}

실행 결과