Around a year ago I got the privilege of working with some really talented folks on the UE4 Infiltrator Demo. A few of us were tasked with building the 'upstairs' city section of the level, where the big Bot fires at the Infiltrator.
About 4-5 artists tackled the city environment. I was responsible for modeling both the High and Low poly versions as well as contributing to the scene meshing, materials, post, and lighting work.