The Displace filter applies distortion according to a pattern defined by a displacement map. The lightness values of pixels within the displacement map determine the degree to which the distortion occurs.
About the Displace filter
This filter can be applied as a non-destructive, live filter. It can be accessed via the Layer menu, from the New Live Filter Layer category.
Settings
The following settings can be adjusted in the filter dialog:
Strength—sets the intensity of pixel displacement. Negative values shift pixels upwards, positive values shift pixels downwards. Type directly in the text box or drag the slider to set the value.
Scale To Fit—when selected (default), the displacement map stretches or shrinks to fit the document size. If this option is off, the displacement map retains its native dimensions.
Load Map From File—sets the displacement map used in the filter. In the pop-up dialog, navigate to and select a file, and click Open.
Load Map From Layers Beneath—determines the displacement map using layers beneath the selected layer.