Scale models of buildings offer three-dimensional clarity not possible to visualize in two-dimensional presentations, permit group planning by architect staffs, and help pave the way for client acceptance for unusual design ideas. Study models loosely represent the architect's rough sketches and afford a means of staff study before project details are frozen into prints and material specifications. The more refined presentation models are exactly to scale and are used, in addition to group planning, for client sales presentation and for public display. Presentation models are taken from the architect's final prints and renderings, affording a check on occasional dimensional errors which would be costly if encountered later during actual construction stages. Exterior materials are selected to accurately represent the finished wall appearance. Fidelity of color and texture is achieved by employing as reference color chips and sample materials supplied by the architect. Added realism can be obtained by lighting the models from the interior.