An example of the Pointillism filter from Alien Skin Snap Art.
The Pointillism filter generates dots of color in the style of George Seurat. Color variation and dot size can be adjusted.
Alien Skin Snap Art is a collection of filters that can give your photos the artistic styling of colored pencil, Impasto, Pointillism, pen and ink, pencil sketch, pastels, comics, watercolor, oil painting, and Pop Art. Pointillism is one of ten artistic effects filters included with Snap Art.