Added default volume profile asset change to the undo stack (case 1285268).

com.unity.render-pipelines.high-definition/CHANGELOG.md

@@ -1,4 +1,4 @@
-# Changelog
+# Changelog
 All notable changes to this package will be documented in this file.
 
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
@@ -42,6 +42,7 @@ The version number for this package has increased due to a version update of a r
 - Fixed nan when a decal affects normals.
 - Fixed issue with TAA causing bleeding of a view into another when multiple views are visible.
 - Fix an issue that caused issues of usability of editor if a very high resolution is set by mistake and then reverted back to a smaller resolution.
+- Fixed issue where Default Volume Profile Asset change in project settings was not added to the undo stack (case 1285268).
 
 ### Changed
 - Combined occlusion meshes into one to reduce draw calls and state changes with XR single-pass.

com.unity.render-pipelines.high-definition/Editor/RenderPipeline/Settings/DefaultSettingsPanel.cs

@@ -245,6 +245,7 @@ void Draw_VolumeInspector()
                 }
                 else if (newAsset != asset)
                 {
+                    Undo.RegisterCompleteObjectUndo(hdrpAsset, "Default Volume Profile Asset Change.");
                     asset = newAsset;
                     hdrpAsset.defaultVolumeProfile = asset;
                     EditorUtility.SetDirty(hdrpAsset);