Version: 5.4
public static Camera.CameraCallback onPostRender ;

説明

カメラがレンダリングを終えた後に発生するイベント

using UnityEngine;
public class ExampleClass : MonoBehaviour
{
    // callback to be called after any camera finishes rendering
    public void MyPostRender(Camera cam)
    {
        Debug.Log("PostRender " + gameObject.name + " from camera " + cam.gameObject.name);
    }
    public void OnEnable()
    {
        // register the callback when enabling object
        Camera.onPostRender += MyPostRender;
    }
    public void OnDisable()
    {
        // remove the callback when disabling object
        Camera.onPostRender -= MyPostRender;
    }
}