I'm on KDE 14.14.1 and want to change the default wallpaper. I want to make lots of changes as I want to build a customized kubuntu maybe call it a fork. But there's my problem. There are almost no recent tutorials about customizing Kubuntu (there are lots of old tutorials though).
So my question: Where do I find the configuration file(s) for changing the default wallpaper?
I know I can change them in the settings. However I won't be able to use the GUI when I'm building the iso file for my customized system, so I have to edit the files manually.