8850 Sunset Boulevard uses two different design languages on either side, and creates a blending space in the area between where they come together. 
The Perot Museum uses a large glass block set into the main mass of the building to communicate vertical circulation on the exterior. 
The San Francisco Federal Building has a fairly uniform facade screen with 5 openings. Four are small windows and one is a large public chamber that can view the street and be viewed from the street. 
The Cooper Union has a large central void space which interrupts the conventional floor plates. 
