From what I hear, everything around you affects just how hidden you are. For example, from the IGN impressions, even if you bump into a table, the table will shake making a certain amount of noise. Glass on the floor, creaky floorboards, whether you are in the light or out of it, whether you walk or run, all of these things play a part in just how detectable you are. No longer are guards limited by their line of site, but rather by just how much the player utilized their tools to stay undetectable. That\'s what makes this game so interesting.