Setting One Picture as a Login Background Image

One of the posts here indicated how to get at the series of images that display in the Lock Screen. I liked one of them and changed the Lock Screen to use that exclusively. However I don't care for the Lock Screen so I disabled it in GPEdit. I have set the Login background to use the Lock Screen image. However it appears to continue to use the Spotlight option to display Login background images instead of the image I selected. Is there some way to fix this?

JohnD

That is what I have done:

JohnD

I also tried forcing the Lock Screen to use a specific image via GPEdit;

Changed "Computer Configuration" > "Administrative Templates" > "Control Panel" > "Personalization" >
"Force a specific default lock screen and logon image"
From: "Not configured"
To: "Enabled"
and set Image/Location to "My_Image.jpg" in the location it resided.
That still did not work.

JohnD