User Guide

CHAPTER 9
198
Applying Filters and Effects
Displace Uses an image, called a displacement
map, to determine how to distort a selection. For
example, using a parabola-shaped displacement
map, you can create an image that appears to be
printed on a cloth held at its corners.
This filter creates displacement maps, using a file
with flattened layers saved in Photoshop format
(except Bitmap mode images). You can also use the
files included with your software (search for the
Displacement maps folder).
To use Displace:
1 Choose Filter > Distort > Displace, or use the
Filters palette to apply the Displace filter.
2 Enter the scale for the magnitude of the
displacement.
When the horizontal and vertical scales are set
to 100%, the greatest displacement is 128 pixels
(because middle gray produces no displacement).
3 If the displacement map is not the same size
as the selection, choose how the map will fit the
image—Stretch to Fit to resize the map, or Tile to
fill the selection by repeating the map in a pattern.
4 Choose Wrap Around or Repeat Edge Pixels to
determine how undistorted areas of the image will
be treated. (See “Defining undistorted areas” on
page 191.)
5 Click OK.
6 Select and open the displacement map. The
distortion is applied to the image.
The Displace filter shifts a selection using a color
value from the displacement map—0 is the
maximum negative shift, 255 is the maximum
positive shift, and a gray value of 128 produces no
displacement.
Glass Makes an image appear as if it is being
viewed through different types of glass. You can
choose a glass effect or create your own glass
surface as a Photoshop file and apply it. You can
adjust scaling, distortion, and smoothness
settings. When using surface controls with a file,
follow the instructions for the Displace filter.
For more information about Glass filter controls,
see “Using texture and glass surface controls” on
page 191.
Ocean Ripple Adds randomly spaced ripples to
the image’s surface, making the image look as if it
were under water.
Pinch Squeezes a selection. A positive value up to
100% shifts a selection toward its center; a negative
value up to –100% shifts a selection outward.
Polar Coordinates Converts a selection from its
rectangular to polar coordinates, and vice versa,
according to a selected option. You can use this
filter to create a cylinder anamorphosis—art
popular in the 18th century—in which the
distorted image appears normal when viewed in
a mirrored cylinder.
Ripple Creates an undulating pattern on a
selection, like ripples on the surface of a pond.
For greater control, use the Wave filter. Options
include the amount and size of ripples.