9

264 Chapter 18: Effects and Environments
Min Lum—
Theminimumluminancevalueapixel
must have in order to have the Blur effect applied
to it.
Max Lum—Themaximumluminancevalueapixel
canhavefortheBlureffecttobeappliedtoit.
Brighten—Brightens the portion of the image that
the Blur effect is applied to.
Blend—Blends the Object ID Blur effect with the
original rendered image.
F. Radius—Fe athers the Blur effect applied to pixels
that fall between the Minimum and Maximum
luminance values. When using Luminance as a
Pixel Selection, the Blur effect can create a hard
edge on the effect. Use the spinner to feather the
blur and eliminate the hard edge of the effect.
Mater ial ID—Applies the Blur effect to a material or
part of a material with a specific Material Effects
Channel (page 2–1443), if the material matches the
Filter settings. To add or replace a Material Effects
channel, use the spinners or enter a value in t he ID
text box and then click the appropriate button.
Min Lum—Theminimumluminancevalueapixel
must have in order to have the Blur effect applied
to it.
Max Lum—Themaximumluminancevalueapixel
canhavefortheBlureffecttobeappliedtoit.
Brighten—Brightens the portion of the image that
the Blur effect is applied to.
Blend—Blends the Material Blur effect with the
original rendered image.
F. Radius—Fe athers the Blur effect applied to pixels
that fall between the Minimum and Maximum
luminance values. When using Luminance as a
Pixel Selection, the Blur effect can create a hard
edge on the effect. Use the spinner to feather the
blur and eliminate the hard edge of the effect.
Genera l S ettings group
Feather Falloff control c urve
The Feather fa l loff curve allows you to determine
the feather fal loff off the Blur effect based on a
graph. You can add points to the graph to create a
falloff curve, and adjust the interpolation in those
points.
Move—Lets you move the points on the g raph.
This button is a flyout, providing free movement
(the default), horizontal, a nd vertical movement.
Scale Point—Lets you scale the points on the
graph. This moves each selected point vertically,
in proportion to its previous value. Click a point to
scale, or draw a selection rectang le around several
contiguous points to select them, and then drag
any point in the selection to scale them all.
Add Point—Lets you create additional points on
the f alloff curve. This button is a flyout, providing
linear points (the default) and Bezier p oints with
handle.
Delete Point—Removespointsfromthegraph.
Br ightening—These radio buttons let you select
additive or multiplicative brightening. Additive
brightening is brighter and more distinct than
multiplicative brightening. Additive brightening
is useful when you use blur in combination
with a Glow effect (page 3–226).Multiplicative