The purpose of the flush glass framing against the flooring really works well, in illustrating the idea of a seamless transition from the interior to the exterior, with the architecture being as unobstrusive as possible.

Nearly 7 million actual polygons in the scene (and rising) with nearly 37000 instances at around 35000 polygons. Grand total of nearly 100 million polygons in order to recreate the very realistic landscape. Clearly the design has moved away from becoming an “underground” space, as it was initially intended.I have also again changed the visual direction of the images, in contrast to the last set.