Many of the Best Architects use models as an integral part of their design process.

Many of the Best Architects make ample use of physical models in their design development process.
Here are some pictures of the Studio Gang and Jeanne Gang the designer of the Aqua Tower in Chicago, USA.
Nice model shop.   Nice models, how about a 3d printer or two.  I recommend a Z corp 510 and an Objet or Projet.    Perhaps they want to join us at SME rapid 2010 in May for the day long session on 3d printing in Architecture?