I just followed a good tutorial. It was not so difficult to create this effect using Elements, but there were some problems.
After cropping a suitable picture, copying it four times and increasing the size of the canvas, I just did the same steps for each copy:
- aligned a copy with the chosen side the option "align" of the Move tool.
- flipped that layer horizontally / vertically
- used the free transfer tool to squeeze the copy (I found it easier to put 25.1 in the required box and untick the box about proportions)
- used the perspective tool to complete the side
- adjusted the brightness of the side .
I'm happy with the result. You can see it on Flickr.