Introduce World.LocalShroud. Breaks targeting stealth tanks. Probably breaks FrozenUnderFog.

OpenRA.Mods.RA/AttackBase.cs

@@ -214,7 +214,6 @@ namespace OpenRA.Mods.RA
 			return inRange
 				.Where(a => a.Owner != null && self.Owner.Stances[a.Owner] == Stance.Enemy)
 				.Where(a => HasAnyValidWeapons(Target.FromActor(a)))
-				.Where(a => !a.HasTrait<Cloak>() || a.Trait<Cloak>().IsVisible(a, self.Owner))
 				.OrderBy(a => (a.CenterLocation - self.CenterLocation).LengthSquared)
 				.FirstOrDefault();
 		}