Fix ref image and modify comparison settings

Try to fix an instability in the SVL test in the HDRP Runtime test

Author: alelievr

Tests/SRPTests/Projects/HDRP_RuntimeTests/Assets/Scenes/012-SVL_Check.unity

@@ -368,11 +368,11 @@ MonoBehaviour:
     TargetWidth: 1920
     TargetHeight: 1080
     TargetMSAASamples: 1
-    PerPixelCorrectnessThreshold: 0.01
-    PerPixelGammaThreshold: 0.01
-    PerPixelAlphaThreshold: 0.01
+    PerPixelCorrectnessThreshold: 0.0001
+    PerPixelGammaThreshold: 0.0001
+    PerPixelAlphaThreshold: 0.0001
     RMSEThreshold: 0
-    AverageCorrectnessThreshold: 0.001
+    AverageCorrectnessThreshold: 0.0001
     IncorrectPixelsThreshold: 0.0001
     UseHDR: 0
     UseBackBuffer: 0
@@ -383,7 +383,7 @@ MonoBehaviour:
     m_PersistentCalls:
       m_Calls:
       - m_Target: {fileID: 2144884655}
-        m_TargetAssemblyTypeName: SVLChecker, SVL_CHecker
+        m_TargetAssemblyTypeName: SVLChecker, UnityEngine.TestTools.Graphics
         m_MethodName: Check
         m_Mode: 1
         m_Arguments:
@@ -406,6 +406,55 @@ MonoBehaviour:
     type: 2}
   forceCameraRenderDuringSetup: 0
   containsVFX: 0
+--- !u!1 &1006407683
+GameObject:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  serializedVersion: 6
+  m_Component:
+  - component: {fileID: 1006407685}
+  - component: {fileID: 1006407684}
+  m_Layer: 0
+  m_Name: Global Volume
+  m_TagString: Untagged
+  m_Icon: {fileID: 0}
+  m_NavMeshLayer: 0
+  m_StaticEditorFlags: 0
+  m_IsActive: 1
+--- !u!114 &1006407684
+MonoBehaviour:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 1006407683}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 11500000, guid: 172515602e62fb746b5d573b38a5fe58, type: 3}
+  m_Name: 
+  m_EditorClassIdentifier: 
+  m_IsGlobal: 1
+  priority: 0
+  blendDistance: 0
+  weight: 1
+  sharedProfile: {fileID: 11400000, guid: 3a3f28ee0ca656a4480a7cbe7c3fc4e8, type: 2}
+--- !u!4 &1006407685
+Transform:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 1006407683}
+  serializedVersion: 2
+  m_LocalRotation: {x: 0, y: 0, z: 0, w: 1}
+  m_LocalPosition: {x: 0, y: 0, z: 1.2269}
+  m_LocalScale: {x: 1, y: 1, z: 1}
+  m_ConstrainProportionsScale: 0
+  m_Children: []
+  m_Father: {fileID: 0}
+  m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
 --- !u!1 &2097985372
 GameObject:
   m_ObjectHideFlags: 0
@@ -566,3 +615,4 @@ SceneRoots:
   - {fileID: 235661759}
   - {fileID: 2097985376}
   - {fileID: 2144884656}
+  - {fileID: 1006407685}

Tests/SRPTests/Projects/HDRP_RuntimeTests/Assets/Scenes/012-SVL_Check/Global Volume Profile.asset

@@ -0,0 +1,167 @@
+%YAML 1.1
+%TAG !u! tag:unity3d.com,2011:
+--- !u!114 &11400000
+MonoBehaviour:
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+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 0}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 11500000, guid: d7fd9488000d3734a9e00ee676215985, type: 3}
+  m_Name: Global Volume Profile
+  m_EditorClassIdentifier: 
+  components:
+  - {fileID: 258076708804270471}
+--- !u!114 &258076708804270471
+MonoBehaviour:
+  m_ObjectHideFlags: 3
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 0}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 11500000, guid: 2d08ce26990eb1a4a9177b860541e702, type: 3}
+  m_Name: Exposure
+  m_EditorClassIdentifier: 
+  active: 1
+  mode:
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+    m_Value: 0
+  meteringMode:
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+    m_Value: 2
+  luminanceSource:
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+    m_Value: 1
+  fixedExposure:
+    m_OverrideState: 1
+    m_Value: 0
+  compensation:
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+    m_Value: 0
+  limitMin:
+    m_OverrideState: 1
+    m_Value: -1
+  limitMax:
+    m_OverrideState: 1
+    m_Value: 14
+  curveMap:
+    m_OverrideState: 1
+    m_Value:
+      serializedVersion: 2
+      m_Curve:
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+        time: -10
+        value: -10
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+        outSlope: 1
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+        time: 20
+        value: 20
+        inSlope: 1
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+      m_PreInfinity: 2
+      m_PostInfinity: 2
+      m_RotationOrder: 4
+  limitMinCurveMap:
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+    m_Value:
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+      m_Curve:
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+        time: -10
+        value: -12
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+      m_Curve:
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+        time: -10
+        value: -8
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+      m_PreInfinity: 2
+      m_PostInfinity: 2
+      m_RotationOrder: 4
+  adaptationMode:
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+    m_Value: 1
+  adaptationSpeedDarkToLight:
+    m_OverrideState: 1
+    m_Value: 3
+  adaptationSpeedLightToDark:
+    m_OverrideState: 1
+    m_Value: 1
+  weightTextureMask:
+    m_OverrideState: 1
+    m_Value: {fileID: 0}
+  histogramPercentages:
+    m_OverrideState: 1
+    m_Value: {x: 40, y: 90}
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+    m_Value: 0
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+    m_Value: 0
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+    m_Value: 0
+  proceduralCenter:
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+    m_Value: {x: 0.5, y: 0.5}
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+    m_Value: {x: 0.3, y: 0.3}
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+    m_OverrideState: 1
+    m_Value: -30
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+    m_Value: 30
+  proceduralSoftness:
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