User default wallpaper

Contributing
1

I removed the default wallpapers in favor of my own.
I used dconf files in etc to update the default wallpapers but they do not apply when an account gets created.
I also have other dconf settings and they do apply so the problem is not there.
Reading dconf dump, the settings for background is gone.
So somewhere it’s being updated.
I could overwrite the default wallpapers with my own, but there must be a more elegant way to do this right?

Can someone chime in?

I use the ublue silverblue image as a base.

2

While I"m using Blue Build for my custom images, the thing you want to do (in Gnome, at least) is set these two properties to your desired wallpaper:

[org.gnome.desktop.background]
picture-uri='file:///usr/share/backgrounds/mac-rebisz-20170306-blue-sunrise.jpg'
picture-uri-dark='file:///usr/share/backgrounds/mac-rebisz-20170306-blue-sunrise.jpg'

The key difference here is that I’m going through a module that changes the gschemas instead of dconf.