Light streaming through a window.
But then I found this tutorial! Streaming Light It was created for Bryce, but I'm sure something similar could be achieved in any program that uses lights that you can place yourself.
So, fellow 3D artists, go out there and create something new! We can't let the photogs have all the fun!
Related image searches
Streaming related image searches
This article has been read 2807 times. Photo credits: Alexkalina.