9

244 Chapter 18: Effects and Environments
Lens Effect. You can also use bitmaps such as
gradient or cellular to determine the radial color.
Fa lloff Cur ve—Displays the Radial Falloff dialog
(page 3–257) in which you can set weights for the
colors used in Radial Color. By manipulating the
Falloff Curve you can make the effect use more of
one color or map than the other. You can also use
a map to determine the falloff when a light is used
as a L ens Effects source.
Circular Color group
Circular Color determines the color of the effect
byusingfourdifferentcolorswatchesthatare
matched to the four quadrants of the effect. A m ap
canalsobeusedtodeterminecircularcolor.
Mix—MixescolorssetinRadialColorandcolors
set in Circular Color. Setting the spinner at 0 will
only use values set in Radial Color while setting the
spinner at 100 will only use values set in Circular
Color. Any value between 0 and 100 will mix
between the two values.
Fa lloff Curve—Displays the Circular Falloff dialog
(page 3–254) in which you can set weights for the
colors used in Circular Color. By manipulating the
Falloff Curve you can make the effect use more of
one color or map than another . You can also use a
map to determine the falloff when a light is used
as a L ens Effects source.
Radial Size group
Determines the radial size around the p articular
Lens Effect. Clicking the Size Curve button
displays the Radial Size dialog (page 3–259).
Using the Radial Size dialog you can create points
on a line and move those points along a graph
todeterminewheretheeffectshouldbeplaced
around the light or object. You can also use a map
todeterminewheretheeffectshouldbeplaced.A
check box is used to activate the map.
Manual S eco ndary Elem e nt rollout, Options
panel
Apply Element To group
Lights—Applies the eff ect to lights picked in Lens
Effects Globals under the Parameters tab in the
Lights group box.
Image—Applies the effect to the rendered image
using p arameters set in Image Sources.
Image Centers—Applies to the center of an object
or to portions of an object as determined by the
Image Filters.
Image Sources group
Object ID—Applies the Lens Effect to particular
objects in your scene that have a corresponding
G-Buffer (page 3–946) (or Object) ID. The
G-Buffer is a geometry buffer and c an be defined
when you right-click any object and select
Properties from the menu. Then, set the Object
Channel ID under the G-Buffer ID controls.