Edge Marking not rendering Posted this on another forum already, but at this point I'm trying to get as much help as possible. I've also already gone through a handful of other forums trying to fix freestyle edge rendering since it will not show up at all. I'm trying to recreate the edge effects in the photo on the right to get my model even more accurate.
I think your problem is in Freestyle's logic of inclusion and exclusion.

In any one Line Set, the relation between 'Select By' Methods is logical AND.

Here's an example cube with extrusions:



The inner cube's edges are marked Freestyle. The extrusions' outer faces are marked Freestyle.

If you 'Select By' Edge Type, (Inclusive, OR, Marked Edges) you get this:



If you 'Select By' Face Mark (Inclusive, One Face) you get this:



So far, so good.. but if you combine both 'Select By' criteria in the same Line Set, you get this:



.. because there are no edges that satisfy both criteria.

So the rule of thumb, to keep life simple, unless you need to make peculiar selections, is to restrict yourself to one 'Select By' method plus 'Visibility' per Line Set. If you need to select by two different methods, it will usually be a good idea to put them in different Line Sets: