The were just some of the initial sketchbook doodles.
I did this by "projecting" some random images and photos onto the sculpture in the computer as a sanity test. I used a variety of more complex photos to simple geometric shapes to see what worked best or not all. Luckily they all seemed to work ok but with my experience of previous similar projects the block colour seemed to work well in most varying environmental factors at play.
Once one side was painted it was rotated and the next image done until all four were complete.