Reintroduced the ability for FSR2 to output to a render texture again. Very basic for now.

Assets/Scripts/Fsr2Controller.cs

@@ -247,14 +247,6 @@ namespace FidelityFX
             _renderCamera.rect = _originalRect;
             _renderCamera.ResetProjectionMatrix();
 
-            if (dest != null)
-            {
-                Debug.LogError("FSR2 is not set to output directly to the backbuffer");
-                Graphics.Blit(src, dest);
-                enabled = false;
-                return;
-            }
-
             _dispatchCommandBuffer.Clear();
             
             // Update the input resource descriptions
@@ -269,14 +261,25 @@ namespace FidelityFX
                 _dispatchDescription.Reactive = Fsr2Pipeline.UavAutoReactive;
             }
 
-            // We are rendering to the backbuffer, so we need a temporary render texture for FSR2 to output to
-            _dispatchCommandBuffer.GetTemporaryRT(Fsr2Pipeline.UavUpscaledOutput, _displaySize.x, _displaySize.y, 0, default, DefaultFormat, default, 1, true);
+            if (dest == null)
+            {
+                // We are rendering to the backbuffer, so we need a temporary render texture for FSR2 to output to
+                _dispatchCommandBuffer.GetTemporaryRT(Fsr2Pipeline.UavUpscaledOutput, _displaySize.x, _displaySize.y, 0, default, DefaultFormat, default, 1, true);
+            }
+            else
+            {
+                // We have more image effects lined up after this, so FSR2 can output straight to the intermediate render texture
+                _dispatchCommandBuffer.SetGlobalTexture(Fsr2Pipeline.UavUpscaledOutput, dest, RenderTextureSubElement.Color);
+            }
 
             _context.Dispatch(_dispatchDescription, _dispatchCommandBuffer);
 
-            // Output the upscaled image to the backbuffer
-            _dispatchCommandBuffer.Blit(Fsr2Pipeline.UavUpscaledOutput, dest);
-            _dispatchCommandBuffer.ReleaseTemporaryRT(Fsr2Pipeline.UavUpscaledOutput);
+            if (dest == null)
+            {
+                // Output the upscaled image to the backbuffer
+                _dispatchCommandBuffer.Blit(Fsr2Pipeline.UavUpscaledOutput, dest);
+                _dispatchCommandBuffer.ReleaseTemporaryRT(Fsr2Pipeline.UavUpscaledOutput);
+            }
 
             if (autoGenerateReactiveMask)
             {