In the Fantasy Grounds Unity that is being developed now, they define LOS areas by color coding. Red areas are complete line of sight blockers like it does now in Roll20 but it adds a "terrain" version, denoted with a green area you define that makes it so that people cannnot see past the area, but they can see in the area. This works for rubble and stairs and things like that.. I would add one more (Maybe "yellow" in this case) where you can see in this area, but you cannot walk in it. (This would work for any pillars or desks or statues) Right now, the line of sight blocker makes players see nothing but a black area where the art is. I have to play around with it so they see pillars. Thanks!