This policy setting ignores Windows Logon Background. This policy setting may be used to make Windows give preference to ...

This policy setting ignores Windows Logon Background.

This policy setting may be used to make Windows give preference to a custom logon background. 

If you enable this policy setting, the logon screen always attempts to load a custom background instead of the Windows-branded logon background. 

If you disable or do not configure this policy setting, Windows uses the default Windows logon background or custom background.