Go to Filter > Pixelate > Color Halftone ... This second method is a really good way to get a subtly different dot pattern, as well as a bit more texture and a “grungy” Xerox-like result. 1.

The Color Halftone filter interface includes no preview window, so you must apply it to see its effects and undo them to change your settings. You can't apply Color Halftone to a transparent layer.

It should probably come as no surprise to anyone that the images which we look at every day – whether printed or on a display – are simply illusions. That cat picture isn’t ...

Halftone patterns work by reducing a solid surface of color into dots of decreasing size. As the dots gradually reduce to nothing, they leave nothing behind except a background color.