Turn any photo into a dot grid artwork with these Photoshop actions. You'll get great results with dots that change size. They get larger in brighter areas and smaller in darker areas. Free download available.
Concentrate on your Toolbar, set the foreground color to #FF0000 and pick the Ellipse Tool.
Move to your canvas and create a 26 x 30px vector shape.
Select the Rectangle Tool, create a 14 x 15px vector shape and place it as you can see below.
Pick the Add Anchor Point Tool, focus on the rectangle vector shape and add a new anchor point as you can see in the next image.
Select the Convert Point Tool and click once on the anchor point added in the previous step to delete the handles.
Grab the Direct Selection Tool, select the highlighted anchor point and hit the left arrow button from your keyboard four times which will move your selected anchor point 4px to the left.