AutoCAD 2008 User's
Guide > Control the Drawing
Views > Change
Views > Control the 3D
Projection Style >
Overview of Parallel and Perspective Views
You can create realistic visual effects in a drawing by defining either parallel or perspective projections of a model.
The difference between perspective views and parallel projections is that perspective views require a distance between a theoretical camera and target point. Small distances produce severe perspective effects; large distances produce mild effects.
The following illustration shows the same model in both a parallel projection and perspective projection. Both are based on the same viewing direction.
