HDRP_Tests: Ref-image optimization step.

Author: amsXYZ

Tests/SRPTests/Projects/HDRP_Tests/Assets/GraphicTests/HDRP_EditModeTests/PreviewTests.cs

@@ -165,7 +165,7 @@ public IEnumerator AssetPreviewIsCorrect()
 
             yield return AssetPreviewTesting.CompareAssetPreview<Material>(
                 "Assets/GraphicTests/Common/Materials/LitMetallicEmissive.mat",
-                "Assets/ReferenceImages/Preview/LitMetallicEmissive.png",
+                "Assets/PreviewTestsImages/LitMetallicEmissive.png",
                 threshold);
 
             EditorApplication.ExitPlaymode();

Tests/SRPTests/Projects/HDRP_Tests/Assets/GraphicTests/Tests/HDRP_Graphics_Tests.cs

@@ -127,6 +127,12 @@ public class HDRP_Graphics_Tests
     )]
     [IgnoreGraphicsTest("3012_MipMapMode_MipStreamingPerformance$", "There seems to be issues with the texture-streaming behaviour on all platforms.")]
     [IgnoreGraphicsTest("4012_MotionBlur_CameraOnly$", "Missing ref-image.")]
+    [IgnoreGraphicsTest(
+        "4075_PhysicalCamera-gateFit$",
+        "Noisy result in Linux + VK..",
+        graphicsDeviceTypes: new[] { GraphicsDeviceType.Vulkan },
+        runtimePlatforms: new []{ RuntimePlatform.LinuxEditor }
+    )]
     [IgnoreGraphicsTest(
         "4088_DRS-DLSS-Hardware$",
         "Instability https://jira.unity3d.com/browse/UUM-75549",