I found three public-domain objects that turned out to share one form: John Smibert's 1733 portrait of the Boston merchant Richard Bill at the Art Institute of Chicago, a Milanese shaffron of about 1575 — etched steel with gilding — from the same museum, and a 1909 photomicrograph of a diatom from the Public Domain Image Archive. The round buttons on Bill's coat, the rows of rivets along the armour's edges and the silica pores of the diatom are the same thing at three scales: a raised boss. I built a Recraft V4 Style that rebuilds every surface of the picture from large glossy spheres — beadwork and polished metal instead of paint — and used it for The Beaded Gymnasium, 1738, eight portraits of Georgian gentlemen and ladies working out on modern machines.