https://gamesartist.co.uk/convergence/
Environment Artist, Artur Romanov has created this cool multiple story city diorama based on concept. In this article he talks about, goals, ref, blockout, exporting, polishing, ZBrush, UDIMs, characters, shaders, VFX, water, post process & lighting.
https://www.artstation.com/uberone
https://www.artstation.com/artwork/B3DqP6