/usr/lib/pd/doc/3dp/ is in pd-pdp 1:0.12.5-1.1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/pd/doc/3dp/examples/
/usr/lib/pd/doc/3dp/examples/arm.pd
/usr/lib/pd/doc/3dp/examples/example01.pd
/usr/lib/pd/doc/3dp/examples/example02.pd
/usr/lib/pd/doc/3dp/examples/example03.pd
/usr/lib/pd/doc/3dp/examples/example04.pd
/usr/lib/pd/doc/3dp/examples/example05.pd
/usr/lib/pd/doc/3dp/examples/example06.pd
/usr/lib/pd/doc/3dp/examples/example07.pd
/usr/lib/pd/doc/3dp/examples/example08.pd
/usr/lib/pd/doc/3dp/examples/example09.pd
/usr/lib/pd/doc/3dp/examples/example10.pd
/usr/lib/pd/doc/3dp/examples/example11.pd
/usr/lib/pd/doc/3dp/examples/example12.pd
/usr/lib/pd/doc/3dp/examples/example13.pd
/usr/lib/pd/doc/3dp/examples/example14.pd
/usr/lib/pd/doc/3dp/examples/example15.pd
/usr/lib/pd/doc/3dp/examples/example16.pd
/usr/lib/pd/doc/3dp/objects/
/usr/lib/pd/doc/3dp/objects/3dp_for-help.pd