Thanks. It's my engineering mindset, which pretty much every DF player has to some extent.
I mean, I'm thinking of dwarven biospheres, where they are locked into a room at the middle of a cast obsidian structure with a stockpile of seeds, booze, a bed, a table and chair, a pick, etc. The room is filled with water, the structure is dropped, causing the door to auto-deconstruct and draining the water out into the farming area. Then the dwarf begins to build their own bedroom and dining table, plant seeds and set up the still, sealed beneath the waves. And then... you could drop another dwarf on top of them, or to the side, and create a larger colony.
And now... I'm thinking of a fractal colony of spheres packed in a pyramid.