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.
On the top most of layer groups, add Vibrance layer adjustment (just go to Layer > New Adjustment Layer > Vibrance). Click OK, then increase the value until we get more vibrance blue/teal color for the entire image ( in my experiment, the value for vibrance is +49 while saturation value is +17 ).
Add another layer adjustment, which is Color Balance (found in Layer > New Layer Adjustment > Color Balance). Adjust Color balance value until the illustration become a bit greenish (in my experiment, the value for midtones color balance is: -8, +15, +1)
Hide background layer and all other layer group except the top, inside, left, bottom and two adjustment layer on top (see below image to be certain). Select the top most layer (color balance layer) and then press Shift+Ctrl+Alt+E to merge all visible image into a new layer.
Unhide layers we've been hide in the previous step, then drag layer 11 ( the merged layer ) below layer group 'bottom'. Load a selection by Ctrl+Clicking this layer thumbnail, and then save the selection via Select > Save selection menu. You can give any name for the selection (in this example, I name it alpha-1), click OK to save it.
Still in the same layer, go to Edit > Transform > Distort and try to align the merged layer so it look like a reflection. Use the Layer > Layer Mask > Hide All, which is will add layer mask filled with black, completely hiding layer 11 content's.
Now grab the soft round Brush tool with low opacity ( 25% ), make sure you choose white for brush color. Slowly using brush tool in the below part to create reflections. See image below for guidance.
Make sure we're still in the layer mask, then go to Select > Load Selection menu. Inside the load selection dialog, choose alpha-1 channel and then click OK to load the selection. Fill this selection with 100% black.Don't deselect, yet!.
Add a new layer on top of current layer, name it 'shadows' since here we gonna add shadows for the ocean-pie piece. Fill the selection with 100% black, then deselect it by pressing Ctrl+D.