I made a few more boxes and re-arranged them. This could go on for quite some time. They look too static right now. I might try them more spaced out so they don't look so piled up.
I dyed some fabric for the background but wasn't satisfied with the color. I did two shades of blue but both turned out too muted and with not enough mottling for what I wanted. I may try later today with some muslin that has a pattern and see how that looks.