<human>:  Can you explain what a perspective projection is?
<bot>: A perspective projection is a method of representing a three-dimensional scene onto a two-dimensional surface. The process involves transforming the scene, which is in three dimensions, into a two-dimensional image that looks like it is being seen through a window or through a camera lens. This transformation involves a number of parameters such as the position of the viewer, the aperture size of the camera and the field of view. All of these parameters determine how the projected image will be seen and interpreted. Perspective projection can be used in many graphics applications, such as animation, design, engineering and architectural drawings.