Some minor optimizations and cleanup

Assets/Scripts/Fsr2Controller.cs

@@ -68,11 +68,11 @@ public class Fsr2Controller : MonoBehaviour
         if (!_started)
             return;
         
-        _context = Fsr2.CreateContext(DisplaySize, RenderSize, Fsr2.InitializationFlags.EnableMotionVectorsJitterCancellation | Fsr2.InitializationFlags.EnableFP16Usage);
+        _context = Fsr2.CreateContext(DisplaySize, RenderSize, Fsr2.InitializationFlags.EnableMotionVectorsJitterCancellation);
 
         // TODO: do we need a depth buffer for the output? We will need depth & motion vectors for subsequent post-FX. How should FSR2 output these?
         // TODO: can probably be a temporary RT
-        _upscaledOutput = new RenderTexture(DisplaySize.x, DisplaySize.y, 24, RenderTextureFormat.ARGBHalf) { name = "FSR2 Upscaled Output", enableRandomWrite = true };
+        _upscaledOutput = new RenderTexture(DisplaySize.x, DisplaySize.y, 0, RenderTextureFormat.ARGBHalf) { name = "FSR2 Upscaled Output", enableRandomWrite = true };
         _upscaledOutput.Create();
     }
 
@@ -105,6 +105,9 @@ public class Fsr2Controller : MonoBehaviour
         var motionVectors = RenderTexture.GetTemporary(renderBuffer.width, renderBuffer.height, 0, RenderTextureFormat.RGHalf);
         Graphics.Blit(renderBuffer, motionVectors, CopyMotionVectorsMaterial);
 
+        // TODO: if `dest` is null, we are rendering straight to the backbuffer and should use a temporary RT as the output buffer for FSR2
+        // TODO: if `dest` it NOT null, we have more image effects lined up after this one, and we should be able to have FSR2 output straight to `dest` without an intermediary temp RT 
+        
         _dispatchDescription.ColorDepth = renderBuffer;
         _dispatchDescription.MotionVectors = motionVectors;
         _dispatchDescription.Output = _upscaledOutput;
@@ -126,10 +129,11 @@ public class Fsr2Controller : MonoBehaviour
 
         _context.Dispatch(_dispatchDescription);
         
-        RenderTexture.ReleaseTemporary(motionVectors);
-        
         // Output upscaled image to screen
         // TODO: we should probably use a shader to include depth & motion vectors into the output
+        // TODO: if `dest` is null, we likely don't care about the depth & motion vectors anymore
         Graphics.Blit(_upscaledOutput, dest);
+        
+        RenderTexture.ReleaseTemporary(motionVectors);
     }
 }

Assets/Scripts/SubsampleTest.cs

@@ -38,11 +38,15 @@ public class SubsampleTest : MonoBehaviour
             //outputCameraObject.transform.hideFlags = HideFlags.HideInHierarchy | HideFlags.HideInInspector;
 
             outputCamera = outputCameraObject.AddComponent<Camera>();
-            //outputCamera.CopyFrom(gameCamera);
+            outputCamera.backgroundColor = Color.clear;
+            outputCamera.clearFlags = CameraClearFlags.Nothing;
             outputCamera.eventMask = 0;
             outputCamera.cullingMask = 0;
-            outputCamera.clearFlags = CameraClearFlags.Nothing;
-            
+            outputCamera.useOcclusionCulling = false;
+            outputCamera.orthographic = true;
+            outputCamera.allowMSAA = false;
+            outputCamera.renderingPath = RenderingPath.Forward;
+
             _fsr2Controller = outputCameraObject.AddComponent<Fsr2Controller>();
         }
         
@@ -58,9 +62,9 @@ public class SubsampleTest : MonoBehaviour
             24, // Can we copy depth value from original camera?
             RenderTextureFormat.ARGBHalf);  // Can we copy format from original camera? Or renderer quality settings?
 
-        gameCamera.depthTextureMode = DepthTextureMode.Depth | DepthTextureMode.DepthNormals | DepthTextureMode.MotionVectors;
+        gameCamera.depthTextureMode |= DepthTextureMode.Depth | DepthTextureMode.MotionVectors;
         
-        gameCamera.targetTexture.name = "FSR2 Source Texture";
+        gameCamera.targetTexture.name = "FSR2 Input Texture";
         gameCamera.targetTexture.Create();
         
         // Adjust texture mipmap LOD bias by log2(renderResolution/displayResolution) - 1.0;
@@ -94,9 +98,6 @@ public class SubsampleTest : MonoBehaviour
         }
         
         outputCamera.enabled = gameCamera.enabled;
-        //outputCamera.CopyFrom(gameCamera);
-
-        outputCamera.clearFlags = CameraClearFlags.Color;
 
         if (Screen.width != _prevScreenSize.x || Screen.height != _prevScreenSize.y || qualityMode != _prevQualityMode)
         {