https://gamesartist.co.uk/lisbon-streets-environment-carlos-vidal/
3D Artist, Carlos Vidal has recreated these beautiful streets based on Alfama, one of the oldest districts in Lisbon. In this article he explains his material and modelling techniques. He talks about, inspiration & ref, making the tram line, rails, texturing, vertex blending, blueprints, decals, megascans and rendering.
https://www.artstation.com/carlosvidalcasan
https://www.artstation.com/artwork/nE8J49