Editing Drawing (section)

==Perspective==
{{Main|Perspective (graphical)|l1=Perspective}}
[[File:2-punktperspektive.svg|thumb|left|Two-point [[perspective drawing]]]]

Linear perspective is a method of portraying objects on a flat surface so that the dimensions shrink with distance. Each set of parallel, straight edges of any object, whether a building or a table, follows lines that eventually converge at a vanishing point. Typically this convergence point is somewhere along the horizon, as buildings are built level with the flat surface. When multiple structures are aligned with each other, such as buildings along a street, the horizontal tops and bottoms of the structures typically converge at a vanishing point.

When both the fronts and sides of a building are drawn, then the parallel lines forming a side converge at a second point along the horizon (which may be off the drawing paper.) This is a two-point perspective.<ref>{{cite book|last=Watson|first=Ernest W.|title=Course in Pencil Sketching: Four Books in One|year=1978|publisher=Van Nostrand Reinhold Company|location=New York|isbn=978-0-442-29229-4|pages=167–75}}</ref> Converging the vertical lines to a third point above or below the horizon then produces a three-point perspective.

[[File:Joeri Van Royen.jpg|right|thumb|upright|An artist [[figure drawing|drawing a figure]] from [[worm's-eye view|worm's-eye perspective]]]]
Depth can also be portrayed by several techniques in addition to the perspective approach above. Objects of similar '''size''' should appear ever smaller the further they are from the viewer. Thus the back wheel of a cart appears slightly smaller than the front wheel. Depth can be portrayed through the use of '''texture'''. As the texture of an object gets further away it becomes more compressed and busy, taking on an entirely different character than if it was close. Depth can also be portrayed by reducing the contrast in more distant objects, and by making their colors less saturated. This reproduces the effect of '''atmospheric''' haze, and cause the eye to focus primarily on objects drawn in the foreground.