I wonder if this scenery is actually the view from one of the houses in your mini town
Yes, that’s exactly what it is. (Well observed 
)(…) or a picture pasted as texture of a wall outside?
I’m not at all comfortable with using background images glued to a wall. I prefer to use models to design my backgrounds.The way I work, there are some heavy drawbacks with fixed background images:
When using photographs harvested on the net, the light and shadows are already set, so my lighting options and my focal perspective become very limited. I'm stuck with the atmospheric mood as well as the angle and focal length of the background image.
If I should want to change the time of day, or change the photographic angle, I would have to change the image.
It would appear a bit awkward to have different backgrounds in a series of shots taken at the same location.
Well...
My mini town (fake city) consists of a mixture of real houses and textured boxes. The boxes are textured with transparent png’s, where some of the windows have been cut out. This enable me to create an illusion of evening/night by placing a light source inside the box. The light will then shine thru the openings of the transparent png's.
Anyway, here is a daytime shot of the building- It's taken from across the street at a later date than the interior shots, so there are some minor differences in the layout.
The apartment where the shot was made is located at the 1st floor ( US=2nd) over the entrance.
Cec
