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Copyright
© 1999 by Bonnie Skaalid
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Illusion
of Space and Depth
We
live in a three-dimensional world of depth. When we look
around us, some things seem closer, some further away. The
artist can also show the illusion of depth by using the
following means:
- Size
& Vertical Location
- Overlapping
- Detail
(Aerial or Atmospheric Perspective)
- Linear
Perspective

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Size
& Vertical Location
Since
objects in our environment look smaller when they
are farther away, the easiest way to show depth is
to vary the size of objects, with closer objects
being larger and more distant objects being
smaller. As well, we perceive objects that are
higher on the page and smaller as being further
away than objects which are in the forefront of a
picture.
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Overlapping
When
objects are partially obscured by other objects in
front of them, we perceive them as further back
than the covering objects.
We do not see them as incomplete forms, just
further back.
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Detail
(Aerial or Atmospheric
Perspective)

Atmospheric
perspective uses color and value contrasts to show
depth. Objects which are further away generally
have less distinct contrast - they may fade into
the background or become indistinct dark areas. The
foreground objects will be clear with sharper
contrast. Here
is a link to Leonardo da Vinci's use of aerial
perspective: Investigating
aerial perspective
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Linear
Perspective (Converging
Lines)

Linear
perspective is based on the idea that all lines
will converge on a common point on the horizon
called the vanishing point. You have observed
linear perspective when you notice that the lines
on the highway appear to meet at a point in the
distance. Artists use linear perspective to create
a focal point for a picture. Any walls, ceilings,
floors or other objects with lines will appear to
come together at the horizon line. These lines
converging lead our eyes towards that point. Often,
the most important object or person in the picture
will be located at that point. You can see in the
drawing above how all the lines in the drawing seem
to lead your eye toward the church in the center
back of the drawing.
Other
types of perspective, such as two-point or multipoint perspective
are also used. Two-point perspective, which occurs when you display
a building from a corner view, as opposed to a front view, is often
used by architects to show a more three-dimensional view of a building. To
learn the mechanics of setting up a picture using linear or multipoint
perspective check out this site: Art
Studio Chalkboard
Here
is a web page which investigates linear perspective
in Leonardo da Vinci's work: Exploring
Linear Perspective
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