Well, this definitely did not take 20mins or a hour. It took a several hours across several days
I reused a few things, but most of it was made from stratch. I like Dwarven architecture a lot, and found some concept art that inspired me, but by time I noticed I was well into adding as much as I could and in detal.
Not sure if the lighting and fog worked out at the end, particularly the later. Instead of a scaled up cube, I modelled a few random shapes, to give the impression of having clouds of mists, but even with that, the fog still showed as a cube.
Edit: as for lighting, the lanterns and fires are a mix of emission and point lights