You know when you're standing between two walls that both have mirrors on them and it makes it look like each mirror is an infinite tunnel going into oblivion?
Something like this:
(photo from Daniel Hong's website).
So, I'm trying to achieve the same effect in a claustrophobic elevator scene, using planes with a glossy material, and it looks like the reflections somehow stop or become very dark after a few bounces:
How could I make the light fade little by little after each bounce and not really ever become completely black?