Hi Jonathan,
Thank you for sharing your essay, in particular for reminding me about fractals, how wonderful they are, and for showing us your butterfly set. Also thanks for responding to the many comments.
I thought you might find this you tube video TED talk interesting if you haven't already come across it. Michael Hansmeyer talking about building shapes that can not be imagined because they are too complex and at a scale of folding that can't be carried out by human beings. He shows that how to produce these shapes can be thought about quite simply, even though the output itself is unimaginable. It is a very simple process likened to morphogenesis and he mentions breeding of types to produce new designs. He also mentions designing processes rather than shapes in the future. So it seems we are not limited by our imagination. Michael Hansmeyer: Building unimaginable shapes.
I also posted it on Silvia Wenmackers discussion as she wrote and talked about being unable to imagine the unimaginable. Best wishes, Georgina