ADOFAIRenderer/Core/PostRenderHook.cs

using System.Collections;
using System.Reflection;
using HarmonyLib;
using UnityEngine;

namespace ADOFAIRenderer.Core
{
    [DefaultExecutionOrder(int.MaxValue)]
    internal class PostRenderHook : MonoBehaviour
    {
        private FieldInfo? _camQuadMeshField;

        private void Awake()
        {
            _camQuadMeshField = AccessTools.Field(typeof(scrCamera), "camQuadMesh");
        }
        
        private void LateUpdate()
        {
            if (RenderManager.Instance)
                RenderManager.Instance.OnLastUpdate();
            
            StartCoroutine(PostFrameCoroutine());
        }

        private IEnumerator PostFrameCoroutine()
        {
            yield return new WaitForEndOfFrame();
            
            var val = (MeshRenderer)_camQuadMeshField!.GetValue(scrCamera.instance);
            if (RenderManager.Instance)
                RenderManager.Instance.OnPostFrame(val.sharedMaterial.mainTexture as RenderTexture);
        }
    }
}