This is a replica of a deck prism used to allow sunlight below decks on sailing ships.

https://en.wikipedia.org/wiki/Deck_prism

I printed with a fuzzy skin and gyroid infill in green transparent PLA.

Two versions: one that's about 6 inches across and another that's about 4 inches across.  The prisms are roughly cubic in dimensions.

Obviously, this won't really work as a deck prism.  It won't conduct light.  I just eyeballed the dimensions based on proportions.  This model is provided with no suited purpose.