Grass Valley Karrera Video Production Center v.4.0 - Manual (Page 102)

102 KARRERA — User Manual
Section 3 — Video Mix/Effects
Light Type
OFF — turns off the light source.
Point — simulates a spotlight type of lighting effect that radiates light
evenly in all directions.
Bar — simulates lighting from a bar-shaped long, thin lighting source.
Plane — simulates the glare that would be reflected from an image if a
bright light were shined on it from infinity.
Light Control Pane
Position
Used with Point and Bar light sources to control the position of the point
light, or the position of some point along the bar light, with respect to the
X, Y and Z axes in 3D space.
Rotation
Used with Bar and Plane light sources to control the direction of the bar light,
or the direction that the plane light faces along the X, Y and Z axes. Setting
Rotation to 0 places the Plane light directly behind the viewer’s head.
Appearance
Intensity — provides soft knob control of the overall reflectivity of the
surface of the picture.
Softness — control of softness of the edge of the light. 100% creates
maximum softness, 0% gives a hard edge. At extremely small values
some aliasing artifacts may appear.
Gloss — provides soft knob control of how much light is scattered as it
is reflected off the surface of the picture. At 100% the lighting acts like
it is reflecting off of a mirror. At 0% the light acts like it is reflecting off
of a frosted piece of glass.
Flare
When light reflects off a surface two lighting components result, the
primary reflected light and a glare (flared halo) of scattered light. The Flare
controls provide soft knobs to adjust this lighting component.
Intensity — controls the amount of the flare light scattered off the surface.
Ratio — controls the ratio between the primary light and the flare light.
100% is all primary light, 0% all flare light.
Independent Flare Intensity
This button allows independent control of the primary and flare compo-
nents of the light. When Off, changing the value of one control will alter the
appearance of the other component of the light. The actual values reported
on the menu will not be different, but the changes will interact automati-