@order Well, the rules aren't perfect. You should still be able to see a lighthouse in the distance even if you can't see where you're walking. Doesn't help you much with your immediate surroundings but still. That's the IRL thing that happens. Also consider the same with stars - you can see them, probably even navigate by them (in terms of general directions). But if you might still trip over some branch that's in your path. Because you didn't see it.