User Guide

GNU Image Manipulation Program
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Figure 15.148: With two horizontal bars
15.10.9 Ripple
15.10.9.1 Overview
You can find this filter through Filters → Distotrts → Ripple.
It displaces the pixels of the active layer or selection to waves or ripples reminding a reflection on disturbed water.
15.10.9.2 Options
Preview The result of your settings will appear in the Preview without affecting the image until you click on OK.
Options
Antialiasing Antialiasing: This improves the scaled look the image borders may have.
Retain Tileability Retain Tileability: This preserves the seamless properties if your image is a tile pattern.
Orientation That’s the Horizontal or Vertical direction of waves.
Edges Because ripples cause pixel displacement, some pixels may be missing on the image sides:
• With Wrap, pixels going out one side will come back on the other side, replacing so the missing pixels.
• With Smear, the adjacent pixels will spread out to replace the mixing pixels.
• With Black, the missing pixels will be replaced by black pixels.
Wave Type These options are self-explanatory
• Sawtooth
• Sine
Period The Period is related to wavelength (0-200 pixels)
Amplitude The Amplitude is related to wave height (0-200 pixels).