Most of the studies done for the effective use of this potential of computer aid in architectural design assert that the way architects design without the computer is not "familiar" to the way architects are led to design with the computer. In other words, they complain that the architectural design software does not work in the same way as the architects think and design the models in their brains. Within the above framework, this study initially discusses architectural design as a modeling process and defines computer generated simulations (walkthrough, flythrough, virtual reality) as models. Based on this discussion, the "familiarity" of architectural design and computer aided design is displayed. And then, it is asserted that the issue of familiarity should be discussed not from the point of the modeling procedure, but from the "trueness" of the model displayed.

Therefore, it is relevant to ask to what extent should the simulation simulate the design model. The simulation, actually, simulates not what is real, but what is unreal. In other words, the simulation tells lies in order to display the truth. Consequently, the study proposes measures as to how true a simulation model should be in order to represent the design model best.