Match Motion Blur

Match Motion Blur

Don’t neglect the possibility of motion blur! It can be your
friend until it appears unwanted, like a malingering houseguest,
impossible to ignore.
A good track won’t look right until its motion blur also
matches that of the background plate. Matching motion
blur is similar to color or grain matching; you do it by eye,
most often zooming in to an area of the frame where it is
apparent in both the foreground and background.
Motion blur settings are not interactive; they reside in
Composition Settings (Ctrl+K/Cmd+K) > Advanced, where
you don’t see the effect of your changes until you clear
the dialog by clicking OK. As described back in Chapter 2,
adjust Shutter Angle and Shutter Phase until you see a good
match, raising (or in the odd case, lowering) Samples per
Frame and Adaptive Sample Limit to match.

If you’re trying to stabilize a scene that contains motion
blur, you have a bigger problem, one that needs to be
avoided when shooting (by boosting the shutter speed of
the camera, where possible. In such cases it’s
no doubt preferable to smooth camera motion rather than
lock the stabilization (see “Smooth a Camera Move” later
in this chapter).