title: Change image via in scriptable object in Unity
body: <p>So im trying to make a Text adventurer game and i want to change the background of the game when a specific dialogue shows up. I already have a black Image at the start and want to change it throughout the game.</p>
  
  <p>I've made a scriptable object for the dialogues.</p>
  
  <pre><code>using System.Collections;
  using System.Collections.Generic;
  using UnityEngine;
  using TMPro;
  using UnityEngine.UI;
  
  [CreateAssetMenu(menuName = "Dialogue")]
  public class Dialogue : ScriptableObject
  {
  
  [TextArea(10, 14)] [SerializeField] string dialogueText;
  [SerializeField] string hintText;
  [SerializeField] Dialogue[] nextDialogue;
  [SerializeField] public Image background; // Thats the old Image that I want to change
  [SerializeField] public Sprite newBackground; // Thats the new Background I want to put in Image
  
  
  public bool dialogueHolder;
  
  public void Awake()
  {
      if (background != null)
      {
          background.sprite = newBackground; // this code is not working
      }
  }
  public string getHintText()
  {
      return hintText;
  }
  public string GetDialogue()
  {
      return dialogueText;
  }
  
  public Dialogue[] GetNextDialogue()
  {
      return nextDialogue;
  }
  </code></pre>