I’m trying a version 262 (r44913 for XP32) of graphicall
To create the internal edges I activate render\freestyle: line set\crease
and set the crease angle > 90°.
I can not, however, to control the inner sides of the surfaces of the parallelepiped or to establish the lines in the lines of intersection.
Below I attach render, scrrenshot of settings and file blend pending of suggestions
freestyle.blend (470 KB)