I worked on the Season 5 MP map Petrov Oil Rig, where I was the environment art "Map Runner". My responsibilities included building the environment in the map editor, tasking the environment art team, and working with Lighting and Design to execute the art direction.
This was the largest map I've worked on for this game (with a big art team), so there's only a few areas I can say I had full ownership from start to finish. Most of my artwork went toward the fire station, the muster station (plus the yellow building nearby), the torch flare, and the cooling towers. As always, it was a big team effort.