Exchanging the animation level in the matinee.

Saldations to all!
In my project, I have an animation of 2 cameras in sequence in the matinee (Director) .I have the intention to change the level at the moment of the transition from one camera to another, because I wish that in this passage of the camera, transforming from daytime to nighttime scene. I can not find any other viable solution in UE4, and I have no idea how to do it there on the matinee, on the lead track. Can someone light up an exit?