Essentially, perspective projection is the way that we see things from our eyes.

Photographic lenses and the human eye work in the same way, therefore perspective projection looks most realistic.

However, this is not true when using perspective projections.

These projections use perspective projection, from a specific view point in 4-dimensions, and projecting the model as a 3D shadow.

When the Earth is photographed from space, the camera records the view as a perspective projection.

Space exploration led to a renewed interest in the perspective projection.

Currently (2006), general perspective projections are of interest for another reason.

In the same way, perspective projection from four dimensions produces similar foreshortening effects.

Figures 1-3 show the principle of an artificial perspective projection.

As a result, any perspective projection of space can be represented as a single matrix.