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118 Chapter 4: Object Properties
Note:
If multiple objects are selected and have
different By Layer settings, this button will read
‘Mixed’.
Multiplier—Affects the length of the motion-blur
streak.
If you choose either form of motion blur here in
theObjectPropertiesdialog,youmustalsochoose
to apply that type of blur in the
Render Scene
dialog (page 3–2)
.
The rendering speed of object motion blur
depends on the complexity of the geometry to
which it’s assigned. The rendering speed of image
motion blur depends on the amount of rendered
screen space ta ken up by the blurr ing object.
In most cases image motion blur renders m ore
quickly. Object motion blur renders more quickly
when applied to very simple objec ts, and image
motion blur renders more slowly when the object
takesupalotofscreenspace,andmovesallthe
way across the screen in a single frame.
Changing the Objec t Blur Multiplier value.
Enabled—When on, enables motion blur for
this object . When off, motion blur is disabled
regardless of the other blur sett ings. Default=on.
You can animate the Enabled check box. The
main use of animating Enable is to apply motion
blur over only a limited range of frames. This can
save a tremendous amount of time when you are
rendering an animation.
You can enable motion blur for lights and cameras.
With the mental ray renderer, moving lights and
cameras can generate motion blur. However,
they do not generate motion blur with the default
scanline renderer.
•
None—Turns off the state of motion blur for the
object.
•
Object— Object motion blur (page 3–1075)
provides a t ime-slice blur effect.
•
Image— Image motion blur (page 3–1049) blurs
the object’s image based on the velocity of each
pixel.
Advanced Li ghting Pa nel ( Object
Properties Dia log)
Select object or objects. > Edit m enu > Object Properties
> Objec t Properties dialog > Advanced Lighting panel
Select object or objects. > Right-click. > Transform
(lower-right) quadrant of the quad menu > Properties >
Object Properties dialog > Advanced Lighting panel
Layer manager > Click the icon next to an o bject’s name.
> Objec t Properties dialog > Advanced Lighting panel
This p anel of the Object Properties dialog lets you
customize how objects behave under advanced
lighting (the
Light Tracer (page 3–43) or radiosity
(page 3–50)
).