Some of the pillars in chamber of pillars seams to block line of sight but others don't they all have the thick outline and you can stand on the ones that don't block line of sight.
I just arrived here, its true. Some of the pillars let you stand on them, they are identified differently but are pillars just like the others.
I think the center pillars work but the ones next to walls out on the edges are just rough terrain but they all look identical
Yes, and in both threads, I believe we can be sure it's a bug. They've said the thick black outline is your visual cue for blocked terrain; if ever there's an exception, it ruins the point of the cue.