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.
Press Ctrl + Shift + C to copy merged and Ctrl + V to paste the selection on a new layer. Because we only need the texture and not the colors desaturate the layer by pressing Ctrl + Shift + U. Change the layer blend mode to Overlay and lower the opacity to 40%. Move this layer on top and clip it to "Metal Ball" layer.
Create a new layer above all layers (Ctrl + Shift + N) and clip it to the layer below (the texture layer). Select a round soft brush tool and set it's Opacity to 40%. Paint gently the edges of the metal ball. Change the layer blend mode to Multiply and further lower the opacity to around 60%. This step will add a bit of shading to the metal ball – I will call it metal apple from now on.
To further add some shading and get rid of the flat look of our metal ball let's add Curves Adjustment Layer above all layers and clip it to the layer below. Drag the curve downwards to darken.
Click on the Curves layer mask and press Ctrl + I to invert the colors thus filling the mask with black. Now select a round soft brush and paint again at the edges of the metal apple to give it some 3D look. Take a look at my layer mask below for reference.
Now let's make the little depressed area where the steam connects to the apple. In order to do this click on the background layer (the original one with three apples) and press Ctrl + J to duplicate. Move this layer on top of all layers (a handy shortcut for doing this fast is Ctrl + Shift + ]) and desaturate (Ctrl + Shift + U).
Change the blend mode of the layer you duplicated in step 17 to Multiply. Add a layer mask (Layer > Layer Mask > Reveal All) and fill it with black (press D to set default colors and Ctrl + Backspace to fill with Background Color). With a round soft brush at 100% Opacity paint with white in the layer mask to reveal the depressed area.
We will need a steam for the apple and I decided to use the one from the left apple. The reason for that is that the steam from the middle apple it's too short and thin and it won't look good. So go ahead and make a selection of the stem from the left apple using the Pen Tool or your favorite selection tool (to make a selection with the Pen Tool first create your path than press Ctrl + Enter to transform that path into a selection).