Perspective comes in different forms, the most obvious & basic of which is the use of the word in relation to the appearance of relative orientation in a three dimensional space. At first, it may seem irrelevant to photomanipulators, (because, hey, the photographs already are perspectively sound,) but putting more than one photograph in context requires that you learn to see what makes sense and what doesn't.
The Technical Stuff
Perspective (from Latin perspicere, to see through) in the graphic arts, such as drawing, is an approximate representation, on a flat surface (such as paper), of an image as it is seen by the eye. The two most characteristic features of perspective are that objects are drawn:
Smaller as their distance from the observer increasesForeshortened: the size of an object's dimensions along the line of
sight are relatively shorter than dimensions acro