Moved nasty texture array keyword business into the dispatch logic and exposed it as a simple boolean parameter.

Runtime/FSR2/Fsr2.cs

@@ -194,6 +194,7 @@ namespace FidelityFX
             public float CameraFar;
             public float CameraFovAngleVertical;
             public float ViewSpaceToMetersFactor;
+            public bool UseTextureArrays;   // Enable texture array bindings, primarily used for HDRP and XR
             
             // EXPERIMENTAL reactive mask generation parameters
             public bool EnableAutoReactive;

Runtime/FSR2/Fsr2Context.cs

@@ -146,6 +146,9 @@ namespace FidelityFX
                 DebugCheckDispatch(dispatchParams);
             }
             
+            if (dispatchParams.UseTextureArrays)
+                commandBuffer.EnableShaderKeyword("UNITY_FSR_TEXTURE2D_X_ARRAY");
+            
             if (_firstExecution)
             {
                 commandBuffer.SetRenderTarget(_resources.LockStatus[0]);
@@ -267,6 +270,8 @@ namespace FidelityFX
             _resourceFrameIndex = (_resourceFrameIndex + 1) % MaxQueuedFrames;
 
             Fsr2Resources.DestroyAliasableResources(commandBuffer);
+            
+            commandBuffer.DisableShaderKeyword("UNITY_FSR_TEXTURE2D_X_ARRAY");
         }
 
         public void GenerateReactiveMask(Fsr2.GenerateReactiveDescription dispatchParams)

Runtime/FSR3/Fsr3Upscaler.cs

@@ -201,6 +201,7 @@ namespace FidelityFX
             public float CameraFovAngleVertical;
             public float ViewSpaceToMetersFactor;
             public DispatchFlags Flags;
+            public bool UseTextureArrays;   // Enable texture array bindings, primarily used for HDRP and XR
             
             // EXPERIMENTAL reactive mask generation parameters
             public bool EnableAutoReactive;

Runtime/FSR3/Fsr3UpscalerContext.cs

@@ -163,6 +163,9 @@ namespace FidelityFX
                 DebugCheckDispatch(dispatchParams);
             }
 
+            if (dispatchParams.UseTextureArrays)
+                commandBuffer.EnableShaderKeyword("UNITY_FSR_TEXTURE2D_X_ARRAY");
+            
             if (_firstExecution)
             {
                 commandBuffer.SetRenderTarget(_resources.Accumulation[0]);
@@ -288,6 +291,8 @@ namespace FidelityFX
             _resourceFrameIndex = (_resourceFrameIndex + 1) % MaxQueuedFrames;
 
             Fsr3UpscalerResources.DestroyAliasableResources(commandBuffer);
+            
+            commandBuffer.DisableShaderKeyword("UNITY_FSR_TEXTURE2D_X_ARRAY");
         }
 
         public void GenerateReactiveMask(Fsr3Upscaler.GenerateReactiveDescription dispatchParams)