Access Post-Processing (URP) via script

Hello!

I want to access the ColorAdjustment/postExposure option via script during runtime using the Universal Render Pipeline.

This is the code I have written so far but it's not working. In the past it seems to me ways easier to access the Post Processing stack.

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using Cinemachine;
5. using UnityEngine.Rendering;
6. using UnityEngine.Rendering.Universal;
7.  
8. public class CameraRig : MonoBehaviour
9. {
10.     [SerializeField]
11.     CinemachineVirtualCamera mainCamera;
12.  
13.     [SerializeField]
14.     CinemachineFreeLook _2ndCamera;
15.  
16.     [SerializeField]
17.     bool secondcamera;
18.  
19.     ColorAdjustments _colorAdjustment;
20.     VolumeProfile volumeProfile;
21.  
22.     private void Awake()
23.     {
24.        volumeProfile = GameObject.Find("Post Processing").GetComponent<UnityEngine.Rendering.Volume>()?.profile;
25.        if(!volumeProfile.TryGet(out _colorAdjustment)) throw new System.NullReferenceException(nameof(_colorAdjustment));
26.     }
27.  
28.     void Update()
29.     {
30.         if(Input.GetButtonDown("Fire2"))
31.         {
32.             secondcamera = !secondcamera;
33.  
34.             if (secondcamera)
35.             {
36.                 _colorAdjustment.active = true;
37.                 _colorAdjustment.postExposure = 1.2f;
38.                 mainCamera.m_Priority = 9;
39.             }
40.  
41.             else
42.             {
43.                 _colorAdjustment.active = false;
44.                 mainCamera.m_Priority = 11;
45.             }    
46.         }
47.     }
48. }