image for the bump
image deciding where it will be glass
image showing texture applied to façade face... notice that I only applied the black and white texture for proportion and location. In the render program, this black and white texture is used for bumpmap only...
wireframe model shows the geometry is very simple... the whole façades are single polygons... most "complex" geometry are the floor slabs, because of the quantity
removed a single polygon, to show how simple are the window façades.
and behind the window façade planes, with an offset of some 10 centimeters, there is another plane textured with the curtains (a png with transparency)