I'm using Ubuntu 20.04 with Unity as the desktop environment and Nemo is handling my desktop.
For some reason, when I change desktop background with Nemo, there is no fade effect - i.e. the wallpapers just change abruptly without smooth transition - even though in
background-fade is already set to
true, and other animation effects for windows and launcher still work normally.
This seems to affect other wallpaper changing apps as well (wallch in my case). How should I fix this and enable the fade effect when changing wallpapers?