There are 2 Points to look for if you are using the photographic exposure control: 1.It heavily depends on the sizes of the scene 2.You have to use the MR Lights for it to work correct(not 100% sure about this, but i think it was something like that)
edit ignore me don't want the gaming blogs to put 2 and 2 together and make 5. It was a batman related side-project im working on, independantly, but it's probably best I wait lest people get the wrong end of a metaphorical STICK.