loftar wrote:[*]Even if you ignore those things, light-hacks would still be far too useful simply for being able to see the tiles, regardless of any objects.[/list]
No client can display no tiles or objects until your server haven't sent them. Mechanics like "shadow of war" would be good enough - you can "see" persistent objects and tiles, if you have seen them in current session, but they should not be updated until you're close enough again.