Made HDR into an explicit toggle that can be set by the application, rather than a best guess based on the camera settings

Assets/Scenes/SampleScene.unity

@@ -319,6 +319,7 @@ MonoBehaviour:
   qualityMode: 2
   performSharpenPass: 1
   sharpness: 0.8
+  enableHDR: 0
   enableFP16: 0
   enableAutoExposure: 1
   preExposure: 1
@@ -331,6 +332,7 @@ MonoBehaviour:
     cutoffThreshold: 0.2
     binaryValue: 0.9
     flags: 13
+  outputMotionVectors: {fileID: 0}
 --- !u!114 &963194230
 MonoBehaviour:
   m_ObjectHideFlags: 0

Assets/Scenes/SampleScenePPV2Post.unity

@@ -322,6 +322,7 @@ MonoBehaviour:
   qualityMode: 3
   performSharpenPass: 1
   sharpness: 0.8
+  enableHDR: 0
   enableFP16: 0
   enableAutoExposure: 1
   preExposure: 1
@@ -334,6 +335,7 @@ MonoBehaviour:
     cutoffThreshold: 0.2
     binaryValue: 0.9
     flags: 13
+  outputMotionVectors: {fileID: 0}
 --- !u!114 &963194230
 MonoBehaviour:
   m_ObjectHideFlags: 0

Assets/Scenes/SampleSceneTwoCamera.unity

@@ -491,6 +491,7 @@ MonoBehaviour:
   qualityMode: 3
   performSharpenPass: 1
   sharpness: 0.8
+  enableHDR: 0
   enableFP16: 0
   enableAutoExposure: 1
   preExposure: 1

Assets/Scripts/Fsr2ImageEffect.cs

@@ -44,6 +44,8 @@ namespace FidelityFX
         [Tooltip("Strength of the sharpening effect.")]
         [Range(0, 1)] public float sharpness = 0.8f;
         
+        [Tooltip("Enable this if you're passing a pre-tonemapping HDR image to the upscaler.")]
+        public bool enableHDR = false;
         [Tooltip("Allow the use of half precision compute operations, potentially improving performance if the platform supports it.")]
         public bool enableFP16 = false;
 
@@ -132,7 +134,7 @@ namespace FidelityFX
             
             // Initialize FSR2 context
             Fsr2.InitializationFlags flags = 0;
-            if (_renderCamera.allowHDR) flags |= Fsr2.InitializationFlags.EnableHighDynamicRange;
+            if (enableHDR) flags |= Fsr2.InitializationFlags.EnableHighDynamicRange;
             if (enableFP16) flags |= Fsr2.InitializationFlags.EnableFP16Usage;
             if (enableAutoExposure) flags |= Fsr2.InitializationFlags.EnableAutoExposure;
 
@@ -352,7 +354,7 @@ namespace FidelityFX
             RenderTexture.active = dest;
         }
         
-        private RenderTextureFormat GetDefaultFormat() => _renderCamera.allowHDR ? RenderTextureFormat.DefaultHDR : RenderTextureFormat.Default;
+        private RenderTextureFormat GetDefaultFormat() => enableHDR ? RenderTextureFormat.DefaultHDR : RenderTextureFormat.Default;
 
         private Vector2Int GetDisplaySize()
         {