We followed this tutorial: http://www.tutorial9.net/tutorials/photoshop-tutorials/3d-pixel-stretch-effects/
This was a lot of fun. We had to use the marquee tool to make thin lines of the colour blocks, and then duplicate them and stretch them. Then, we had to give them a vanishing point and in the end they all looked like they were stretching into the distance.
I really enjoyed this so I even made another one (second photo). I got a bit more ambitious in this one!
If I were to do it again, I would just focus on the colour palettes.





