User`s guide

Chapter 6 Working with Containers
256
To set the Sweep type:
1. From the Type menu, select Sweep.
2. Set the following:
Changing the Position of the Light Source
Light sources can exist at different locations of a scene. Depending on the type of container
that you are working with, different options are available to move or position the light
source. Frequently, you may find it easier to click-and-drag the light or its vectors in the
Composite window, rather than altering the values in the Controls window.
Edge Falloff Controls the relative softness of the edges of the lit region.
• Default setting of 0 provides a hard edge on the spotlight effect.
Increase this value to soften the edges of the lit region.
• Edge Falloff removes light from the edges of the lit region.
• To maintain the size of the region while softening its edges, increase
Cone Width.
Point At
Source
Select to set Target coordinates relative to the undistorted source so that the
light follows the source as it animates.
Parameter Description
Parameter Description
Target X
Target Y
Sets the X and Y light center. The light comes from infinitely far
away to the light center where it starts to fall off.
Sweep Width Adjusts the size of the width, in pixels, of the light beam.
Intensity Sets the intensity of the light.
Edge Falloff Controls how the light falls off from the center of the beam to the
outside regions of the beam.
• At higher values, the light falls off rapidly outside the center of
the beam creating a hard-edged light beam.
• At lower values, the light falls off gradually toward the outside
of the light beam creating a softer beam.
Point At Source Select the Target coordinates set relative to the undistorted source so
that the light follows the source as it animates.
Sweep Angle Sets the angle between the beam of light and the horizontal axis.