So basically you guys know how the doors at grocery stores automatic open? I’m thinking for 4.0 there should be something to effect some doors/objects so they open once you get near them.
So say, a torch will light up on a wall once you get near it, or when you go into a powered public bathroom its lights will turn on once they detect motion. Maybe this could work for finding out where zombies are if say a light in a bathroom lights up.