This is a great video by Graphisoft showcasing how BIM is used to design complex buildings. In 2010, Wellington Airport in New Zealand gained a new expansion; Studio Pacific in association with Warren and Mahoney Architects designed the The Rock, the new unique International Airport Passenger Terminal.
The new addition doubled international processing capacity to 1000 passengers per hour and added a new departure lounge with seating for 660 passengers.
The Rock was an innovative design incorporating plywood and fibre-cement in the fabric of the building and reusing or salvaging ceiling tiles, security cameras, PA, lights, phones and gate signs.
Although this design seems not to everyones taste, The Rock has also won multiple awards, including the Commercial Architecture Award (2011) and the Gold Award in the Spatial Design category, Designers Institute of New Zealand BEST Awards (2011).
Source: Wellington Airport and Graphisoft (video)