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396 Chapter 19: Video Post-Production

Scheme of a circular gradient

Color (Ra dial and Circular)—Defines the

colors used

(page 3–396)

for an effect. This is based on the

RGB color system, but can also be set with H SV.

Withineachsetofgradientcontrols,thereisa

Radial and Circular Color gradient. Radial Color

works with Circular Color to produce the overall

color for the Lens Effects element.

Transparency (R adial and Circular)—Va r i e s the

v isibility of parts of the effect. The transparency

gradients only make use of brightness (or

luminance) values, w hich are essentially grayscale

values. T his black-to-white ramp of values

pro vides you with 256 levels of transparency

foryoureffects. JustliketheColorgradients,

both Transparency gradients are tied together

to generate the overall visibility of effect. See

Gradient Options (page 3–394)

Size—Varies the s ize of specific parts of the Lens

Effect. Most size gradients are used to affect the

radiusofalensflarepart,suchasaglow. Like

transparency gradients, only the brightness values

are used to provide you with 256 different sizes.

The R adial Size gr adient, for example, works both

like a Radial and Circular gradient. This gradient

is applied in a clockwise fashion, starting at 12

o’clock. Thevaluesinthegradientareapplied

from the center of the effect toward the outer edge,

w ith brig hter values producing bigger sizes and

darker values producing shorter sizes.

Gradient Colors

Rendering menu > Video Post > Video Post toolbar > Add

Image Filter Event > Choose a lens effects filter from the

Filter plug-in list. > S etup > Gradient tab

Colors in 3ds Max are inter preted in two different

ways: RGB and HSV. In RGB (red, green, blue),

you can select one of 256 shades of red, green, and

blue, giving you a palette of 16.7 million colors

(24 Bit). In HSV (Hue, Saturation, Value), you

can select one of 256 hues of color, then adjust the

saturation or the value of the color . The saturation

can also be considered the blackness of a color and

valuecanbeconsideredthewhitenessofacolor.

For transparent and size gradients, you adjust the

vertical whiteness slider just to the left of the RGB

andHSVsliders.Thewhitetriangleontheright

side of the vert ical bar is the slider. This controls

theoverallvalueofthecolorintermsofHSV.In

RGB terms, it is the same as adjusting all three

colors equally at the same time. Higher values on

the whiteness sca le represent more transparency,

or smaller sizes.