Adobe Photoshop CS3 Bedienungsanleitung PDF herunterladen (Seite 394)

PHOTOSHOP CS3

User Guide

387

Tips for creating special effects

Creating edge effects Youcanusevarioustechniquestotreattheedgesofaneffectappliedtoonlypartofanimage.

To leave a distinct edge, simply apply the filter. For a soft edge, feather the edge, and then apply the filter. For a trans-

parent effect, apply the filter, and then use the Fade command to adjust the selection’s blending mode and opacity.

Applying filters to layers You can apply filters to individual layers or to several layers in succession to build up an

effect. For a filter to affect a layer, the layer must be visible and must contain pixels—for example, a neutral fill color.

Applying filters to individual channels You can apply a filter to an individual channel, apply a different effect to each

color channel, or apply the same filter but with different settings.

Creating backgrounds By applying effects to solid-color or grayscale shapes, you can generate a variety of

backgrounds and textures. You might then blur these textures. Although some filters have little or no visible effect

when applied to solid colors (for example, Glass), others produce interesting effects.

Combining multiple effects with masks or duplicate images Using masks to create selection areas gives you more

control over transitions from one effect to another. For example, you can filter the selection created with a mask.

YoucanalsousetheHistoryBrushtooltopaintafiltereffectontopartoftheimage.First,applythefiltertoanentire

image. Next, step back in the History palette to the image state before the filter was applied, and set the history brush

source to the filtered state. Then paint the image.

Improving image quality and consistency You can disguise faults, alter or enhance images, or create a relationship

amongimagesbyapplyingthesameeffecttoeach.UsetheActionspalettetorecordthestepsyoutaketomodifyone

image, and then apply this action to the other images.

Improve filter performance

Some filter effects can be memory-intensive, especially when applied to a high-resolution image.

❖ You can do any of the following to improve performance:

• Try out filters and settings on a small portion of an image.

• Apply the effect to individual channels—for example, to each RGB channel—if the image is large and you’re

having problems with insufficient memory. (With some filters, effects vary if applied to the individual channel

rather than the composite channel, especially if the filter randomly modifies pixels.)

• Free up memory before running the filter by using the Purge command.

• Allocate more RAM to Photoshop. If necessary, exit other applications to make more memory available to

Photoshop.

• Try changing settings to improve the speed of memory-intensive filters, such as Lighting Effects, Cutout, Stained

Glass, Chrome, Ripple, Spatter, Sprayed Strokes, and Glass filters. (For example, with the Stained Glass filter,

increase cell size. With the Cutout filter, increase Edge Simplicity, decrease Edge Fidelity, or both.)

• Ifyouplantoprinttoagrayscaleprinter,convertacopyoftheimagetograyscalebeforeapplyingfilters.However,

applying a filter to a color image, and then converting to grayscale, may not have the same effect as applying the

filter to a grayscale version of the image.

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Adobe Photoshop CS3 Bedienungsanleitung Seite 394