kwin-effects-cube from home:ecsos 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:ecsos/openSUSE_Tumbleweed/home:ecsos.repo zypper refresh zypper install kwin-effects-cube
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:ecsos/15.6/home:ecsos.repo zypper refresh zypper install kwin-effects-cube