I won't do an entire tutorial on this, but here's a basic outline of how I got this look:
- I selected the brush from the set in the link above and put in on its maximum size before stamping it on the blank document.
- I found a photo that had the right feel for this kind of treatment (it happens to be of my sister-in-law), converted it to black and white, and then added a toned gradient.
- Using Select-->Color Range, I selected the circle and square pattern so I could copy it (minus the white) onto its own layer.
- I brought the photo into my "dot" document, resized it as needed, and used the same clipping mask technique you saw in this month's special to make the photo come through.
- Finally, on a new layer I selected some rectangular areas, filled them with various colors, and then lowered the opacity of that layer to create an overlay effect.