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 how to easily recreate the red/blue duotone color grading using the tone curves. You'll learn how to do it in two ways and also learn how to create your own custom duotone colors using a straightforward method.
Although this is a Lightroom tutorial, it can in Photoshop with the Camera Raw filter (Filter > Camera Raw) or by using the Curves adjustment layer (Layer > New Adjustment Layer > Curves).