Graphics Reference
In-Depth Information
the high levels of focal blur-
ring away from the subject.
Now check out some pictures
of landscapes and natural
vistas. Almost everything in
those shots is in sharp focus.
Remember as you apply this
effect that high amounts of
Defocus
indicate a smaller
scale.
Motion Blur
Another kind of processing
that is essential to a believable
scene is motion blur. We ex-
perience the effects of motion
blur in the real world, not just
in movies and television, but
even with our own eyes.
When things move faster than
our ability to process them
or faster than a camera's ability
to capture them, they are
perceived and recorded as
a blur.
Blender simulates this effect
with the
Vector Blur
node,
shown in
Figure 12.17
. Note
that there is a new input
socket: Speed. In order to decide how
things are moving, the node needs speed
information from the renderer. To get it,
head over to the Render properties
context. Remember the
Layers
panel
that we skipped in the previous section?
Expand it. There's a lot there, but for
now, ignore most of it. At the bottom of
the panel, though, are a number of check-
boxes with names like Combined, Z,
Normal, UV, etc. Enable
Vector
. When
Figure 12.15
The camera with Distance target.
Figure 12.16
The Defocus node applied to the sample ile.
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