[deleted]
- Edited
brent Doesn't matter much. I'd move the wallpaper off Downloads folder, though so it doesn't get accidentally deleted. I think Windows makes a .jpg copy of wallpaper to AppData but Linux desktop environments source it directly.
There shouldn't be harm in using a wallpaper from your home folder, the only exception of course being if you want to share a same wallpaper among multiple users. Also if you want to change your LightDM background the file needs to be in a system folder.
brent I think the desktop just stores the path(s) somewhere. If it's multiple wallpapers and it can't load one, it just presumably moves to the next one.