Hi fellow 3D Nutz
Here's the first sketch of my concept...
This very precise and detailed (cough cough) sketch is of a tall skyscraper city. It is based on 3 very thin columns with external lifts, modular flats are built on the columns and then the building progresses to more and more ambitious structures, to observation decks, an aircraft reception port, a large community restuarant, etc....
Engineers will probably think this is a

idea.
Architects if given this project to map out would say
But I'm going ahead anyway. To me it contains all the

elements necessary for this competition.
This drawing was done on an A6 jotting pad, just in case 3D beginners want to make notes on how I go about one of these projects.