The Distortion effects are used to distort, transform or convolute an active layer or selection. You can apply these effects: Displace, Extrude, Pinch, Polar Coordinates, Ripple, Twirl.
Displace. The effect shifts the current layer based on the image selected as a displacement map. The resulting image is covered with a pattern which depends on the form of the map.
Map. Double-click the square to select an image to be used as a displacement map.
The Original Size, Fit, and Tile check-boxes determine the size of the displacement map.
If the Original Size check-box is enabled, the original size map will be used. If the map is smaller than the size of the processed image, it will be repeated to fill the entire image. If the map is bigger, only a part of it appears.
If the Fit check-box is enabled, the image used as a displacement map will be stretched to the size of the processed image. As a result, the displacement map ratio can be changed.
If the Tile check-box is enabled, the image is filled with a map repeated in a grid. In the X and Y fields, specify how many times the map repeats itself horizontally and vertically.
You can shift the color channels by moving color markers and adjusting auxiliary parameters. The Strength parameter (0-500) defines the amount of displacement. The Direction parameter (0-360) specifies the direction in which the image should move.
Extrude. The effect gives the picture a three-dimensional structure. The image is composed of the square blocks protruding from its center.
Size (1-100). The parameter specifies size of the foundation of each block.
Height (0-500). The parameter determines the height of the blocks.
Dispersion (0-500). The parameter influences the variation in the height of the blocks. At the value = 0, all the blocks have the same height. When increasing the parameter, the difference between the heights of individual blocks becomes more evident.
Density (0-100). The parameter increases the number of blocks in the image.
Anti-Aliasing check-box. The parameter reduces the irregularities at the blocks boundaries.
Pinch. The effect stretches or shrinks the image. There are two types of compression:
Spherical. At negative values of the Strength parameter, the image is shrinked toward its center. At positive values, it stretches from the center.
Linear. The image is stretched or shrinked separately in horizontal and vertical direction. At negative values, the image is shrinked. At positive values, the image is stretched.
Polar Coordinates. The effect distorts the image by converting the rectangular coordinates of each point to polar ones (and vice versa).
Shift Х (1.0-100.0). It allows you to shift the center of the effect horizontally.
Shift Y (1.0-100.0). It allows you to shift the center of the effect vertically.
Scale (1.0-100.0). It controls the effect scaling.
Transform. Select the conversion option: from polar coordinates to rectangular or from rectangular to polar ones.
Overlap (0.0-100.0). It hides the seam line.
Flip. It swaps top and bottom.
Ripple. The effect distorts the image by adding the perturbations in the form of small waves.
Wave Height (1-50). The parameter determines the height of the waves.
Wave Length (1-100). The parameter specifies the distance between the crests of waves. The higher the value, the larger the distance.
Reflection (0-50). When increasing the parameter, the wave is reflected about a certain axis. The higher the value, the more reflected waves appear in the image.
Small Waves (0-100). The parameter breaks large waves into smaller ones. The higher the value, the more often they are repeated. The parameter works only if the Reflection parameter is non-zero.
Twirl. The effect twists the edges of the image around its center.
The effect is influenced by the Rotation parameter (-1000..1000) determining the direction and intensity of the twist. Positive values indicate clockwise rotation; negative values indicate anticlockwise rotation.
If the Fixed Preview Area check-box is enabled, all changes will be displayed in a small preview area. If the check-box is disabled, the changes will be applied to the area visible in the Image Window.
Click OK to apply the changes to the image and close the effect dialog box.
Click Cancel to close the dialog box without applying changes.