For lighting I used VRay Sun and VRay Physical Camera, and also one Vray Plane for lighting distant part of room.
I did a few Render Elements, and then combined them in Photoshop. I needed render of all my scene with a cat, pass with fur and also foreground objects.
Else, I created ZDepth channel, which I combined with fur. A little bit of colour correction, chromatic aberration and final picture was ready.