kwin-effects-forceblur from home:chrtall:plasma-addons project
Select Your Operating System
Add repository and install manually
For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:chrtall:plasma-addons/openSUSE_Tumbleweed/home:chrtall:plasma-addons.repo zypper refresh zypper install kwin-effects-forceblur