The diorama appears as a green and white building in many of my finished build photos.

An aerial 35mm slide from 1974
A few views of the plant. The building is long gone and is now a large Amazon Fullfillment center.
My version

A section of the diorama here
A different section of the diorama here

a little trickery

A little trickery with a section of the diorama as the background