/usr/lib/pd/extra/pdp/3dp/ is in pd-3dp 1:0.14.1-2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/pd/extra/pdp/3dp/arm.pd
/usr/lib/pd/extra/pdp/3dp/example01.pd
/usr/lib/pd/extra/pdp/3dp/example02.pd
/usr/lib/pd/extra/pdp/3dp/example03.pd
/usr/lib/pd/extra/pdp/3dp/example04.pd
/usr/lib/pd/extra/pdp/3dp/example05.pd
/usr/lib/pd/extra/pdp/3dp/example06.pd
/usr/lib/pd/extra/pdp/3dp/example07.pd
/usr/lib/pd/extra/pdp/3dp/example08.pd
/usr/lib/pd/extra/pdp/3dp/example09.pd
/usr/lib/pd/extra/pdp/3dp/example10.pd
/usr/lib/pd/extra/pdp/3dp/example11.pd
/usr/lib/pd/extra/pdp/3dp/example12.pd
/usr/lib/pd/extra/pdp/3dp/example13.pd
/usr/lib/pd/extra/pdp/3dp/example14.pd
/usr/lib/pd/extra/pdp/3dp/example15.pd
/usr/lib/pd/extra/pdp/3dp/example16.pd