Unity URP control of post processing effects (example aberration) 2019

PostControl.cs

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

public class PostControl : MonoBehaviour
{

    public Volume volume;
    public ChromaticAberration aberration;

    void Start()
    {
        Volume volume = gameObject.GetComponent<Volume>();
        ChromaticAberration tmp;
        if (volume.profile.TryGet<ChromaticAberration>(out tmp))
        {
            aberration = tmp;
        }
    }

    void Update()
    {

        aberration.intensity.Override(2 + Mathf.Cos (Time.time * 10) );
    }
}