/usr/lib/x86_64-linux-gnu/libs3d.so.2 is in libs3d2 0.2.2-10.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libs3d.so.0.2.2
/usr/lib/x86_64-linux-gnu/libs3d.so.0.2.2