The author of the tutorial is Philipp Schuster. He has made a photo collage in Adobe Photoshop Elements 2.
The creation of the photo collage didn't take long as he used the plug-in AKVIS Chameleon.
Open the collage you made earlier and call AKVIS -> Chameleon -> Make Collage. The previous collage and the fragment (Moon) will appear in the Before tab of the AKVIS Chameleon plug-in window. Select Chameleon mode from the drop-down menu in the Settings Panel.
Now we press the button Ok and the photo collage is ready.