title: Objects in Scene dark after calling LoadScene/LoadLevel
body: <p>I completed Unity's roll-a-ball tutorial and it works fine. I changed a couple of materials to make it look better. I also added a C# script that should restart the level when the player falls off of the ground (I disables the walls). I am using Unity 5.5.</p>
  
  <p>It initially looks like this: <a href="https://i.stack.imgur.com/aTXiB.png" rel="noreferrer"><img src="https://i.stack.imgur.com/aTXiB.png" alt="Screenshot of Initial Level"></a></p>
  
  <p>But when I go off the edge and the level restarts, it looks like this:
  <a href="https://i.stack.imgur.com/bqcR2.png" rel="noreferrer"><img src="https://i.stack.imgur.com/bqcR2.png" alt="Screenshot of Reloaded Level"></a>
  It sometimes looks like this for a few seconds after opening unity when the editor is loading.</p>
  
  <p>Here is the script:</p>
  
  <pre><code>using UnityEngine;
  using System.Collections;
  
  public class DeathTrigger : MonoBehaviour {
  
      // Use this for initialization
      void Start () {
  
      }
  
      // Update is called once per frame
      void Update () {
  
      }
  
      void OnTriggerEnter (Collider other)
      {
          if (other.gameObject.CompareTag("Player"))
              Application.LoadLevel(Application.loadedLevel);
      }
  }
  </code></pre>
  
  <p>Any ideas on what's causing this?</p>