I'm the person who drew the diagram. It's actually a highly detailed 3D Model, which I can rotate and render in different views with different lighting.

The 3D model rendered with Perspective
After making a 3D model of it, I learned a lot about the design and really want to see this building built. It is beautiful and looks better rendered in perspective.
Curved and multi-angle glass buildings are a bigger challenge to render. I submitted a new version, with reflections similar to a late winter evening. The storefronts are more visible in the new diagram's view. The curved section reflects the high clouds and the late evening sun brightens the building, with a glass appearance similar to what is seen in the architect's rendering. The gold from the golden hour light appears on the curved section. I hope everyone likes it.