If you put a mirror in a room, it will only reflect the room.
If you put a mirror in an empty? There is nothing to reflect?

Any mirror can only reflect what is in front of it.
If there is nothing around it? What is there to reflect? 

Poser 1, 2, 3, 4, 5, 7, P8 and PPro2010, P9 and PP2012, P10 and PP2014 Game Dev
"Do not drive faster then your angel can fly"!