Eliminated the extra output color texture copy, which turned out to be not necessary. Both the CAS sharpen pass and Blit will take care of the necessary conversion.

Packages/com.unity.postprocessing@3.2.2/PostProcessing/Runtime/Effects/Upscaling/PSSRUpscaler.cs

@@ -18,8 +18,7 @@ namespace UnityEngine.Rendering.PostProcessing
 		private RenderTexture _inputColor;
 		private readonly RenderTexture[] _inputDepth = new RenderTexture[2];
 		private readonly RenderTexture[] _inputMotionVectors = new RenderTexture[2];
-		private RenderTexture _outputColor;
-		private Texture2D _outputIntermediate;
+		private Texture2D _outputColor;
 		
 		private bool _contextInitialized;
 		private uint _frameCount;
@@ -53,15 +52,14 @@ namespace UnityEngine.Rendering.PostProcessing
 			initParams.autoKeepCopies = 0u;		// We use double buffered depth and motion vector copies created by Unity
 
 			CreateRenderTexture(ref _inputColor, "PSSR Input Color", config.MaxRenderSize, context.sourceFormat, true);
-			CreateRenderTextureArray( _inputDepth, "PSSR Input Depth", config.MaxRenderSize, GraphicsFormat.R32_SFloat, true);
+			CreateRenderTextureArray(_inputDepth, "PSSR Input Depth", config.MaxRenderSize, GraphicsFormat.R32_SFloat, true);
 			CreateRenderTextureArray(_inputMotionVectors, "PSSR Input Motion Vectors", config.MaxRenderSize, GraphicsFormat.R16G16_SFloat, true);
-			CreateRenderTexture(ref _outputColor, "PSSR Output Color", config.UpscaleSize, RenderTextureFormat.RGB111110Float);
 
 			if (PSSRPlugin.CreatePssrContext(ref initParams, out IntPtr outputColorTexturePtr) >= 0 && outputColorTexturePtr != IntPtr.Zero)
 			{
 				// PSSR requires an output color texture in a very particular format (k11_11_10Float with kStandard256B tile mode and a specific alignment) that Unity cannot create directly.
 				// So instead we let the plugin create that texture and then import it into Unity as a generic 32bpp texture from a native pointer.
-				_outputIntermediate = Texture2D.CreateExternalTexture(config.UpscaleSize.x, config.UpscaleSize.y, TextureFormat.RGBA32, false, true, outputColorTexturePtr);
+				_outputColor = Texture2D.CreateExternalTexture(config.UpscaleSize.x, config.UpscaleSize.y, TextureFormat.RGBA32, false, true, outputColorTexturePtr);
 				_dispatchParamsBuffer = Marshal.AllocHGlobal(Marshal.SizeOf<PSSRPlugin.DispatchParams>());
 				_contextInitialized = true;
 			}
@@ -87,13 +85,12 @@ namespace UnityEngine.Rendering.PostProcessing
 				_contextInitialized = false;
 			}
 
-			if (_outputIntermediate != null)
+			if (_outputColor != null)
 			{
-				Object.Destroy(_outputIntermediate);
-				_outputIntermediate = null;
+				Object.Destroy(_outputColor);
+				_outputColor = null;
 			}
 
-			DestroyRenderTexture(ref _outputColor);
 			DestroyRenderTextureArray(_inputMotionVectors);
 			DestroyRenderTextureArray(_inputDepth);
 			DestroyRenderTexture(ref _inputColor);
@@ -156,7 +153,7 @@ namespace UnityEngine.Rendering.PostProcessing
 				_ => null,
 			});
 			_dispatchParams.reactiveMask = ToNativePtr(reactiveMask);
-			_dispatchParams.outputColor = ToNativePtr(_outputIntermediate);
+			_dispatchParams.outputColor = ToNativePtr(_outputColor);
 
 			var scaledRenderSize = config.GetScaledRenderSize(context.camera);
 			_dispatchParams.renderWidth = (uint)scaledRenderSize.x;
@@ -171,9 +168,6 @@ namespace UnityEngine.Rendering.PostProcessing
 			Marshal.StructureToPtr(_dispatchParams, _dispatchParamsBuffer, false);
 			cmd.IssuePluginEventAndData(PSSRPlugin.GetRenderEventAndDataFunc(), 1, _dispatchParamsBuffer);
 			
-			// Convert the native texture into Unity-land using a blind texture data copy
-			cmd.CopyTexture(_outputIntermediate, _outputColor);
-			
 			if (config.performSharpenPass)
 			{
 				// PSSR output is already pretty sharp, and we don't want to over-sharpen the image, so cut the sharpness range by half