PostProcessChange.cs

Changing Post-Processing from a script in URP (Unity 2019.4)

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Rendering;
using UnityEngine.Rendering.Universal;
using UnityEngine.UI;

public class PostProcessChange : MonoBehaviour
{
  public Slider TemperatureSlider;
  
  // Set to update every time the slider is updated
  public void SetColorAccent()
    {
        WhiteBalance wb;
        if(PPVolume.profile.TryGet(out wb))
        {
            wb.temperature.value = TemperatureSlider.value * 200 - 100;
        }
        // This works for any property of any post-processing effect
    }
}