PostProcessHighlight.cs

using System;
using UnityEngine;
using UnityEngine.Rendering.PostProcessing;

[Serializable]
[PostProcess(typeof(PostProcessHighlightRenderer), PostProcessEvent.BeforeTransparent, "Harryh___h/Highlight")]
public sealed class PostProcessHighlight : PostProcessEffectSettings
{
    public FloatParameter scale = new FloatParameter { value = 100 };
    public FloatParameter shine = new FloatParameter { value = 0.4f };
    public FloatParameter shadow = new FloatParameter { value = 0.1f };
    public IntParameter rotations = new IntParameter { value = 30 };
    public FloatParameter depthThreshold = new FloatParameter { value = 0.1f };

}

public sealed class PostProcessHighlightRenderer : PostProcessEffectRenderer<PostProcessHighlight>
{
    public override void Render(PostProcessRenderContext context)
    {
        var sheet = context.propertySheets.Get(Shader.Find("Hidden/Harryh___h/Highlight"));
        sheet.properties.SetFloat("_Scale", settings.scale);
        sheet.properties.SetFloat("_Shine", settings.shine);
        sheet.properties.SetFloat("_Shadow", settings.shadow);
        sheet.properties.SetFloat("_Rotations", settings.rotations);
        sheet.properties.SetFloat("_DepthThreshold", settings.depthThreshold);

        context.command.BlitFullscreenTriangle(context.source, context.destination, sheet, 0);
    }
}