Beautifully composed and lit - I think you demonstrate exactly why an architectural education helps with arch viz.
My one minor quibble is the level of glossiness on some materials - those Ando-inspired cast in-situ concrete panels are not quite that shiny in real life. They definitely do have more reflective sections, but they tend to be a little “flatter” and softly blend between the more rough parts. I see you’ve used Koola’s material, so I assume it can be easily played with? Just the roughness map needs to blend between the darker and lighter sections a little more progressively.
I’m doing my masters in architecture, specialising in arch-viz using UE4 and have spent the last 8-9 months trying to get Zumthor (Thermal Baths at Vals) and Ando (Chichu Art Museum in Japan) into UE4 so can totally appreciate where you’re at. Great work, nice to see some more “elemental” arch-viz work, somehting that isn’t the ubiquitous white Scandinavian apartment.