Tying up some loose ends:

- Clean up lingering contexts on shutdown
- Set UAV state on output texture. Doesn't make any real difference but it seems to be the correct thing.
- Removed some TODOs

FSR3UnityPlugin.cpp

@@ -144,7 +144,16 @@ extern "C" bool UNITY_INTERFACE_EXPORT UNITY_INTERFACE_API AMDUP_InitApi()
 
 extern "C" void UNITY_INTERFACE_EXPORT UNITY_INTERFACE_API AMDUP_ShutdownApi()
 {
-    // TODO: destroy any remaining FSR3Features?
+    for (auto& feature : s_Features)
+    {
+        if (feature.upscalingContext != nullptr)
+        {
+            ffx::DestroyContext(feature.upscalingContext);
+        }
+
+        memset(&feature, 0, sizeof(FSR3Feature));
+    }
+    
     s_BackendDesc.device = nullptr;
 }
 
@@ -242,7 +251,7 @@ static void UNITY_INTERFACE_API OnRenderEventAndData(int eventID, void* data)
         dispatchUpscale.exposure = ffxApiGetResourceDX12(feature.textureTable.exposureTexture, FFX_API_RESOURCE_STATE_PIXEL_COMPUTE_READ);
         dispatchUpscale.reactive = ffxApiGetResourceDX12(feature.textureTable.reactiveMask, FFX_API_RESOURCE_STATE_PIXEL_COMPUTE_READ);
         dispatchUpscale.transparencyAndComposition = ffxApiGetResourceDX12(feature.textureTable.transparencyMask, FFX_API_RESOURCE_STATE_PIXEL_COMPUTE_READ);
-        dispatchUpscale.output = ffxApiGetResourceDX12(feature.textureTable.colorOutput, FFX_API_RESOURCE_STATE_PIXEL_COMPUTE_READ);    // TODO: shouldn't this be FFX_API_RESOURCE_STATE_UNORDERED_ACCESS?
+        dispatchUpscale.output = ffxApiGetResourceDX12(feature.textureTable.colorOutput, FFX_API_RESOURCE_STATE_UNORDERED_ACCESS);
 
         dispatchUpscale.jitterOffset.x = params->jitterOffsetX;
         dispatchUpscale.jitterOffset.y = params->jitterOffsetY;
@@ -259,7 +268,6 @@ static void UNITY_INTERFACE_API OnRenderEventAndData(int eventID, void* data)
         dispatchUpscale.upscaleSize.height = feature.upscaleSizeHeight;
         dispatchUpscale.cameraFovAngleVertical = params->cameraFovAngleVertical;
 
-        // TODO: it's possible that Unity already does this flip, check!
         if (feature.flags & FFX_UPSCALE_ENABLE_DEPTH_INVERTED)
         {
             dispatchUpscale.cameraFar = params->cameraNear;