To create Mosaic effect click Deformation | Mosaic or select Mosaic folder.
Choose two of four different mosaic types, adjust the Size, Space, Light, Height appearance
and Random position of mosaic cells.
The Mosaic effect groups pixels into different blocks.
The cell size is the width of a cell in pixels. The pixels
in a given block are the same color, and the colors
of the blocks represent the colors in the selection.