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Illusion - Is Seeing Really Believing?
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Illusion - Is Seeing Really Believing (1998)(Marshall Media)[Mac-PC].iso
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00213_Field_213.txt
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1996-12-31
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How then does anybody ever
manage to draw properly? One
answer is that we are taught or
teach ourselves. There is of
course much truth in this.
Leonardo taught the principles
of perspective and methods for
their utilization to his
disciples, and art teachers have
been doing the same ever since.
We also pick up a good deal of
information about the geometry
of perspective informally,
through trial and error and by
looking at pictures.
But another answer may be
more important. There is a way
in which we do perceive in
accord with the two-
dimensional characteristics of
the retinal image, which I
referred to earlier as
perception in the proximal
mode. We do perceive railroad
tracks and roads as converging,
for instance, even while we
perceive them as parallel, and
we do perceive plates on a table
as "elliptical," even while
perceiving them as circular.
Although constancy is our
dominant mode of perception,
the presence of the proximal
mode, or the potential to focus
on it, may play a major role in
drawing. When faced with the
task of drawing a road, for
example, the presence of the
proximal mode allows us to copy
the percept in which the sides
of the road converge rather
than the usually dominant
percept in which they are
parallel.