Open your image in Photoshop. I find mine at former photoshoptalent.com/two giraffe contest
Duplicate your original layer and convert it to "Smart object" by clicking right button of your mouse and choose "convert to Smart object" like in below picture
On your duplicate layer converted go to Image->Adjustments ->Shadow/Highlights and set Shadow between 15-25 and Highlights 50-60. IMPORTANT !!! don't hit OK button
On this pop-up menu mark "show more option".Now it's up to you to find a good contras by playing with "Tonal Width" and "Radius" (green mark) or "Color correction" (blue mark).Don't forget each picture is different and you will not have same settings twice.Now you can hit OK :)
Above your second layer create a Curve Adjustment layer by going to half black half white circle hold down Alt key and choose Curve
Now drag black and white slice like in my pic or set "output" to 255 and "input" around 200
Return to second layer and go to Filter->Other->High Pass. In pop-up menu set High pass value between 1 and 2 , from my personal experience a value of 3-4 or above will not help.
You will see at this point under converted layer 3 more "mini layers" :) . put your mouse on "High Pass" right click and when the pup -up menu appears choose "Edit smart filter blending option" (it is first in the menu) . A bigger pop-up will appear called "Blending option (High Pass)".Set Mode to Overlay hit OK and you are done! :)
I hope this tutorial will help you in your future work.
All the best!