My first room constructed in Blender, took me probably too long to make the windows, but glass is tricky. I got the background off a panorama I found online of Coruscant at sunset. I think it's the wrong section of the city/planet, but the atmosphere works.
Rendered with Cycles.
Yep, it's subdivided into triangles. The modeling for this picture was pretty simple, I'm still a beginner.
I'd like to take a guess. For the modeling of the inverted tiles on the floor: While in edit mode, did you create a new object (circle) and expand it until it was large enough to your liking?