From

“Models are different from drawings in an essential way. A model represents an environmental totality. No locations are discarded and none can be discarded. Therefore authorship can no longer be confined to a finite number of directive visual statements representing a finite number of selected locations that are representative of a totality. In a model, totality is explicit instead of implicit. Explicit totality has profound effect on both authors and viewers, and we need to explore it. “

Read more:
A frontier in visual communication – Rob Snyder’s Blog – Bentley Colleague Blogs – Be Communities by Bentley