If a caster used Shadow Evo Greater to cast Force Cage then there's now a full effect Force Cage in play.
If one makes the save then can they move in and out of the Cage. Objects auto make the save so arrows and such can pass through but would the wall block line of effect for everyone or just those that made their saves?
What about [Light]/[Darkness] spells? do they only change light for those that fail saves?