If you have seen the film Arrival (2016), based on a short story by Ted Chiang and directed by Denis Villenueve, you will understand the boundary or border between the visitors and the people communicating with them. They wrote or drew their communications onto the border. The human protagonists were concerned with interpreting the communication. My light box experiments in 2019 put me in mind of the glyphs written on that border.
You can see in the video below, I planned to make some kind of light installation, probably freestanding, for my second year. I planned to include colour and movement to the light and experimented with how big I could go, and how much distance between light and polypropylene.
I also used the laser cutter to engrave the front of the poly to see what that looks like (nice, as it turns out, but no effect on the refraction). I liked that you can see some kind of pattern, even with the light off.