My latest piece has been an interior of an old blast furnace. High poly concept was done in 2 days and the retopology, unwrap, texture inside UE4 took a week. I had to trim down the latest scene and remove the background assets for sake of time and focus mainly on the Generator and foreground walkway and use the background blast furnace as more of a background object, even though it contains as much detail as the Generator, again, out of time.