From: http://www.wearechange.org/2007/10/3d-visualization-of-world-trade-center.html

Posted: Monday, October 22, 2007
3D Visualization of World Trade Center

This video illustrates the efforts of Nathan Evans a Visual Effects and Animation artist to produce a high fidelity visualization of World Trade Center 1 and 2. Showing steel core columns, wiring, ventilation, office furniture, restrooms, concrete, glass, secondary steel columns, office walls and other building content. Keep in mind do to the size of the building it would be impossible to show all the content in these building do to resolution of video and available of processing power that my computer will allow at the present.

In this video it will help you understand visually what the building's content was in wtc1 and 2.

The render is based off the blueprints of floor 47-the noticeable differences of each floor from the blueprints would be the center positioning of the stairs and specific spacing of restrooms and the walls of storage space.