Motion blur is a way
to enhance the realism of a rendered animation by simulating the
way a real-world camera works. A camera has a shutter speed, and
if significant movement occurs during the time the shutter is open,
the image on film is blurred.
Motion blur added to
rendering of an animated wheel as it speeds up and rolls forward
To render motion blur
with the mental ray renderer, you must turn on ray tracing (the
Ray Trace parameter) on the Render Setup dialog Renderer panel
The mental ray renderer
uses a Shutter parameter to control motion blur. This simulates
the shutter speed of a camera. At 0.0, there is no motion blurring.
At 1.0, the maximum amount of motion blurring occurs. Values between
zero and one adjust the amount of motion blur. The closer to 1.0, the
greater the blurring.
You turn on motion blur
and adjust shutter speed on the Render Setup Dialog Renderer panel
If you render using
then by default mental ray applies motion blur to these as well.
See the Render Setup dialog Renderer
& Displacement rollout.
mental ray motion
blur is not recommended for use with particle systems, as this can
increase rendering time considerably. Use a
NoteMotion blur with
the mental ray renderer does not always follow curving trajectories.
Increasing the value of Motion Segments can help, but this works
better for rotary motion than for traveling motion.