XFWM-Effects
Xfce-blur-effects is the actual name. It is a shameless copy of James Hoover's XFCE Effects. His site goes by Kalideva. All the credits for this package goes to him. If you are using XUBUNTU, then utilize the package on his site.
Since you can only create transparency to a certain level in XFWM4's default compositor settings, hence this was created by James only for Xubuntu.
I only changed the installation commands to port it to Arch-Linux. Few things to keep in mind before installing this:
Run software/package update before you install this
make the file executable by running chmod +x xfwm-effects-install.sh
- never run this without root-privileges, or you will end up corrupting your Window manager. The end result would be a black screen after reboot. It's on you and you only.
Visit GitHub repo: xfwm-blur-effects for more details.