I was thinking along the same lines as Sam.....a duplicated shape with a rotated image in each one.
Looking at the example there is one 'crescent' shape which is duplicated and rotated by 72° each time...5 in total.
The image inside each shape is again just a duplicate of the background but for each 'shape' its rotated 30°....up to a total of 120°.
You could use the pen tool, shapes, polygon lasso....any number of methods to create the initial 'crescent'.....after that its as Sam say's....duplicate, rotate, rinse, spin, repeat.
Once you have 5 unique layers each with a rotated shape on it you can then use those to create masks on 5 rotated background images...that is if you want to replicate the example exactly.
On trying this I couldn't get it 'exact' but if you look closely at the example it doesn't appear to be exact either.......the eye is fooled into thinking it all fits precisely....it doesn't quite, but its close enough.
Regards.
MrTom.