Guilty as charged... They are Plastruct O Scale (1/48). Easier to purchase the rails and stairs than making from scratch, though they are...
The problem with scenery is exactly that: details really sell it. Otherwise the building is just a plain MDF/foam/plastic sheet. PS rods and...
Yes, I have seen the sprues around. In those pics you will see commercial resin bits (doors, lights, air conditioners, terminals...), ABS/PS...
My first time in this forum... Though I have played a lot with MDF and foam scenery from different vendors, I prefer very much to build my own...
Another company specially interesting if you are in the USA: GameCraft Mini Take a look at the 28 mm section, specially the scifi future wars and...
Also traditional, but Tre Games has a Japanese Small Temple Gate that would fit...