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.
That's us pretty much finished this tutorial but I did add a few finishing touches to the image and there is still a lot you could do to it. I added a very faint lens flare on a black layer then set it to screen then masked it a lot and lowered the opacity of it. I also put some white lines in to the right of the model and in a new layer then moved the layer to the bottom of the layer stack then masked it out a bit to blend it in. I then did some color adjustments to bring out the reds and some highlights, I used a mixture of Brightness/Contrast, Curves and Color Balance adjustment layers. Just experiment with some adjustment layers until it looks good. Have fun with it.