Diamond Method
http://www.ags.center
Wallpapers

Install:
1)Right-Click on empty area of the Desktop
2)Click "Folder Settings" or "Default Desktop Settings" or "Configure page"
3)Select Wallpaper: Image
4)Click on "Open..."
5)Choose the "Diamond Wallpapers file" on your computer and Click "Open"
6)Choose the "Diamond" and Click "Apply" -> "OK".

License: GPL

Recommend with https://store.kde.org/p/1165858/ + https://store.kde.org/p/1165855/