Fall back to biasColorMask if reactiveMask is empty, because Unity can't seem to make up its mind what either of these textures mean.

FSR2UnityPlugin.cpp

@@ -405,6 +405,9 @@ static void UNITY_INTERFACE_API OnRenderEventAndData(int eventID, void* data)
             dispatchDescription.reactive = ffxGetResourceDX11(&feature.upscalingContext, (ID3D11Resource*)feature.textureTable.reactiveMask.image);
             dispatchDescription.transparencyAndComposition = ffxGetResourceDX11(&feature.upscalingContext, (ID3D11Resource*)feature.textureTable.transparencyMask.image);
             dispatchDescription.output = ffxGetResourceDX11(&feature.upscalingContext, (ID3D11Resource*)feature.textureTable.colorOutput.image, nullptr, FFX_RESOURCE_STATE_UNORDERED_ACCESS);
+
+            if (dispatchDescription.reactive.resource == nullptr)
+                dispatchDescription.reactive = ffxGetResourceDX11(&feature.upscalingContext, (ID3D11Resource*)feature.textureTable.biasColorMask.image);
         }
         else if (s_GraphicsD3D12 != nullptr)
         {
@@ -422,6 +425,9 @@ static void UNITY_INTERFACE_API OnRenderEventAndData(int eventID, void* data)
             dispatchDescription.reactive = ffxGetResourceDX12(&feature.upscalingContext, (ID3D12Resource*)feature.textureTable.reactiveMask.image);
             dispatchDescription.transparencyAndComposition = ffxGetResourceDX12(&feature.upscalingContext, (ID3D12Resource*)feature.textureTable.transparencyMask.image);
             dispatchDescription.output = ffxGetResourceDX12(&feature.upscalingContext, (ID3D12Resource*)feature.textureTable.colorOutput.image, nullptr, FFX_RESOURCE_STATE_UNORDERED_ACCESS);
+
+            if (dispatchDescription.reactive.resource == nullptr)
+                dispatchDescription.reactive = ffxGetResourceDX12(&feature.upscalingContext, (ID3D12Resource*)feature.textureTable.biasColorMask.image);
         }
         else if (s_GraphicsVulkan != nullptr)
         {
@@ -440,6 +446,9 @@ static void UNITY_INTERFACE_API OnRenderEventAndData(int eventID, void* data)
             dispatchDescription.reactive = GetVulkanTextureResource(instance, feature, feature.textureTable.reactiveMask);
             dispatchDescription.transparencyAndComposition = GetVulkanTextureResource(instance, feature, feature.textureTable.transparencyMask);
             dispatchDescription.output = GetVulkanTextureResource(instance, feature, feature.textureTable.colorOutput, FFX_RESOURCE_STATE_UNORDERED_ACCESS);
+
+            if (dispatchDescription.reactive.resource == nullptr)
+                dispatchDescription.reactive = GetVulkanTextureResource(instance, feature, feature.textureTable.biasColorMask);
         }
 
         dispatchDescription.jitterOffset.x = params->jitterOffsetX;