Step 1. Open your image in Photoshop. (this tutorial is for Photoshop only).




Step 2. Duplicate the background layer.




Step 3. Go to: Image>Apply Image.




Step 4. Change the blending Mode to "Screen".




Click "OK"



Step 5. (Important!) Duplicate the Background Copy layer.



Step 6. go to: Filter>Blur>Gaussian Blur



Step 7. Set the radius to an amount of your choosing. I like it at somewhere between 14
and 17. I suggest experimenting with different settings until you find one you like.



Step 8. The last step is to go to the layers palette and change the Blend Mode to "Multiply".



Your Digital Sandwich is now complete. You may want to do a little extra tweaking to the image
if you feel it needs it. I may look a little too light(or dark) overall, in which case you could add a curves adjustment layer to darken (or lighten) it more to your own taste.