I originally did this piece a few years back. It is one of my all time favourites and I have not had time to redo it inside Unreal Engine since that day. However, I do notice weaknesses on my older version such as flatness due to warm color everywhere, lack of contract and not intense daylight to push the focal point more. So, I decided to do a quick tweak for the time being so it can remain here until I redo it from scratch inside engine.
If you want to get an idea on how to do this for your work. Short tutorial and demonstration.