Patchwork

The Patchwork effect creates the appearance of quilted fabric. The small squares of color that result are shadowed to appear at differing heights.

Name	Specifies the operator's name.
Opacity	Sets the opacity of the effect over the input image. A value of 0 makes the effect completely transparent, while a value of 100 makes it completely opaque.
Use Alpha As Mask	Uses the input image's alpha channel as a mask for applying the effect. The effect is fully applied to areas of the image where the alpha channel is white, and not at all to areas where it is black.
Run Effect On	Enable the RGB and/or Alpha options to specify whether the effect is applied to the RGB channels, the Alpha channel, or both.
Square Size	Set higher values to make the patches larger, or set lower values to make them smaller.
Relief	Set higher values to raise the height of the patches, or set lower values to decrease the height.