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.
Learn my biggest Photoshop secret: the "tone chart". This technique makes using the RGB tone curves easier, faster and more accurate. I've been doing this for years to create hundreds of Photoshop actions and Lightroom presets. Watch the video to learn my secret tone curves trick in Photoshop.