/usr/lib/x86_64-linux-gnu/libg3d.so is in libg3d-dev 0.0.8-22.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libg3d.so.0.0.8
/usr/lib/x86_64-linux-gnu/libg3d.so.0.0.8