Added explanatory comments to the helper script

Assets/Scripts/Fsr2ImageEffectHelper.cs

@@ -18,13 +18,19 @@
 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 // THE SOFTWARE.
 
-using System;
 using System.Collections;
-using System.Collections.Generic;
 using UnityEngine;
 
 namespace FidelityFX
 {
+    /// <summary>
+    /// Small helper script to be used in conjunction with the Fsr2ImageEffect script.
+    /// The FSR2 image effect needs to be the last effect in the post-processing chain but for render scaling to work properly, it also needs to be the first to execute OnPreCull.
+    /// Unfortunately altering the script execution order does not affect the order in which OnPreCull is executed. Only the order of scripts on the same game object matters. 
+    /// 
+    /// When combining FSR2 upscaling with other post-processing effects (most notably Unity's Post-Processing Stack V2),
+    /// this script should be added to the same camera and moved up above any other scripts that have an OnPreCull method. 
+    /// </summary>
     [RequireComponent(typeof(Camera), typeof(Fsr2ImageEffect))]
     public class Fsr2ImageEffectHelper : MonoBehaviour
     {