Basically, I want to see the wall so I can show it over a shadow (Z ordering modification based on the shadow caster), If I cannot see it but it is in my range, I want it to be placed under the shadow caster.
So if I can see it, I would make it visible, but if I cannot, making it invisible. I though of LOS since the shadow caster does not have the option to check what is under the shadow and what is not under it.
Now that i think about it, it is probably not the best way to do it.
— E Bear