Adobe PREMIERE PRO 2, Руководство пользователя, Страница: 334 / 448

ADOBE PREMIERE PRO 2.0
User Guide
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Contrast
Specifies the contrast of the cell pattern image when you use the Bubbles, Crystal, Pillow, Mixed Crystals,
or Tubular cell pattern. The control specifies sharpness for any of the Plate or Crystallize options.
Note:
The clip’s contrast is affected by the option chosen in the Overflow menu.
Overflow
Specifies the method used to remap values that fall outside the grayscale range of 0–255. Overflow is not
available when sharpness-based cell patterns are chosen.
•
Clip
Specifies values above 255 as pure white, and values below 0 as pure black. Contrast amount controls how
much of the image falls outside this range; higher contrast amounts result in a mostly black or white image, with less
gray. Therefore, less subtle cellular detail appears at higher contrast settings.
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Soft Clamp
Remaps grayscale values to fall inside the 0–255 range. As a result, contrast appears reduced; the cells
are mostly gray with very few areas of pure black or white.
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Wrap Back
Changes overflow values to the 0-255 range by “folding” values back in the other direction. For
example, if the maximum value allowed is 255 and the actual value is 285 (255 + 30), the resulting value is 225 (255
- 30). As a result, more defined subtle detail appears when Contrast is set above 100.
Disperse
Specifies how randomly the pattern is drawn, thus affecting the angle of the cells relative to each other.
Lower values result in more uniform or grid-like cell patterns.
Size
Specifies the size of the cell shapes. The default size is 60.
Offset
Specifies the portion of the cell pattern visible in the Program monitor. This control is useful when animating
the cell pattern across the boundaries of the clip.
Tiling Options
Choose one of the following options to control tiling:
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Enable Tiling
Renders the cell patterns in seamless tiles. The shape and number of tiles are determined by the
Cells Horizontal and Cells Vertical values.
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Cells Horizontal and Cells Vertical
Specify the number of horizontal or vertical cells on a tile.
Note:
To determine the size of your tiles, use the following calculations: tile width = Cells Horizontal x Size; tile height
= Cells Vertical x Size. For example, to create a tile size of 256x256 pixels, set Size, Cells Horizontal, and Cells Vertical
to 16.
Evolution
Creates subtle changes in the shape of the cell pattern. Animating this control results in smooth changes
of cell shapes over time. Set keyframes for Evolution to determine how much the cell shapes “evolve” over the period
of time allowed between keyframes. The more revolutions in a given amount of time, the more rapidly the cell shape
changes. Higher Evolution values may result in less smooth changes in the cell shapes.
Note:
Although the Evolution value is set in units called “revolutions,” it is important to realize that these revolutions are
progressive. The Evolution state continues to progress infinitely at each new value. Use Cycle Evolution (under Evolution
Options) to return the Evolution setting to its original state at each revolution.
Evolution Options
Because of the complexity of the cell shapes that generate the cell patterns, render time can be
great. For this reason, Evolution Options provide controls that render the effect for one short cycle and loop it for
the duration of your project. Use the controls below to create a smooth, progressive loop segment.
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Cycle Evolution
Creates a loop that forces the evolution state to return to its starting point.
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Cycle (In Revolutions)
Available if Cycle Evolution is selected. Cycle specifies the number of revolutions (of the
Evolution setting) that the cell pattern cycles through before it repeats. For example, if you set the evolution to occur
over five revolutions and you set the Cycle value to 2, the evolution loops twice. The timing or speed of these
Evolution cycles is determined by the amount of time allowed between Evolution keyframes. (The Cycle control