andreas_baumann [1] filed a deletion request for pyqt5-3d [2]: Package had a pkgbase of pyqt5-3d with a pkgname for a package call python-pyqt5-3d in it. The new package is now just checked in in the python-pyqt5-3d.git AUR git repo, with no pkgbase and a pkgname=python-pyqt5-3d.
[1] https://aur.archlinux.org/account/andreas_baumann/ [2] https://aur.archlinux.org/pkgbase/pyqt5-3d/