5.
Depth
of
field
‐
A
useful
and
subtle
technique
for
controlling
the
complexity
of
images
is
depth
of
field.
Æ
Post
‐
production
Because
post
‐
production
techniques
occur
later
in
the
process,
it
is
often
possible
to
adjust
them
based
on
the
results
of
test
compressions,
making
fine
‐
tuning
much
easier.
1.
Static
versus
moving
images
‐
As
in
production,
superfluous
moving
images
aren’t
appropriate
for
content
that
you
plan
to
aggressively
compress.
They
are
not
that
important
for
DVD,
but
they
are
for
web
and
CD
‐
ROM.
2.
Motion
blur
‐
In
the
same
way
that
a
real
‐
world
shutter
speed
introduces
motion
blur
that
helps
compression,
you
can
use
the
virtual
shutter
in
rendering
applications.
For
effects
that
support
motion
blur,
render
them
with
a
shutter
speed
that
matches
that
of
the
source.
3.
Anti
‐
aliasing
‐
This
rendering
technique
softens
the
edges
of
rendered
elements,
letting
a
pixel
at
the
edge
of
an
area
be
an
intermediate
value.
Smoothing
out
transitions
among
parts
of
the
image
improves
compressibility
and
appearance.
4.
Progressive
rendering
‐
When
working
with
interlaced
source
video,
it
may
be
appropriate
to
render
motion
graphics
as
progressive
scan
when
making
the
compression
master.
By
rendering
the
project
in
progressive
scan
mode,
you
can
deinterlace
the
interlaced
source
,
but
the
graphical
elements
remain
a
perfect
progressive.
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