Step 1: Inspiration
I was looking for some sort of modular interlocking design. The paper folding patterns I found were very cool but a little too intense to imagine making in cardboard on a room sized scale. I scaled back my ambitions and started sketching some ideas.
I ended up with two designs that called to me. One looked sort of like large dominoes and the other had a star design made out of the negative space where the pieces came together.