Not made but grown
"Natural forms are not made but grown, and there is a radical difference between the organic and the mechanical.
Things which are made, such as houses, furniture, and machines, are an assemblage of parts put together, or shaped, like sculpture, from the outside inwards.
But things which grow shape themselves from within outwards - they are not assemblages of originally distinct parts; they partition themselves, elaborating their own structure from the whole to the parts, from the simple to the complex."
- Alan Watts
Designing generative systems, artifacts or experiences where it's difficult or impossible to imagine the final result, is much more of a process of growing rather than envisioning and executing. It is a really, really different way of thinking about design, creativity, and production from my background of thumbnail sketches and envisioned details. Every new designer should learn this way of thinking - Ian Bogost calls it "procedural literacy" - from the very beginning of their training.