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Vegreville Pysanka
Bit late for this - a Ukrainian-style Easter Egg sculpture by Ron Resch made in 1973 was the first physical structure designed with 3D design software:
Though the surface area of an egg can be difficult to solve mathematically, the enigma of how to assemble two-dimensional tiles onto a three-dimensional egg was eventually solved[2] by Ronald Resch,[4][5] a computer science professor from the University of Utah, with the assistance of computer-aided design.[2] It was the first physical structure designed entirely with computer-aided geometric modelling software.
