I see that another user here is experiencing a problem I used to have. I didn't think much about it, as I could just set the images again and it would be resolved until the next update.

On January 1st last year, I complained to discord friends that this behaviour had changed: to wit, I would set a wallpaper image, and then a black 'wallpaper' would be automatically assigned. It appeared in the choose your picture section, hence 'wallpaper'. Maybe it's just a solid colour thing. Whatever it is, I can't have my preferred wallpaper.

I don't know what version I was running then, but the issue has persisted since, and I am now running version 12.1 (Beta 1) through Steam.

However. I never once thought "it's DF related" until today, when a post title caused me to think about trying it. And lo and behold, if DF is switched off, the black 'wallpaper' remains, but I can set it and it doesn't change. Not until I load up DF again.

I'm not actually sure what you mean by 'the DisplayFusion wallpaper'. And having looked in the program folder, there doesn't appear to be an obvious image file that would count as wallpaper.

But otherwise I followed the steps and after choosing a standard windows wallpaper, nothing changed. Reverts to black screen.