Goya-black void, single cold key light: a ceremonial genealogy easel stands dead center in an institute chamber, holding a large ancestry chart of a machine family — generations of model-organs drawn as preserved specimens connected by inheritance ribbons, some branches stamped, one branch deliberately scratched out. A white-gloved archivist with back to camera pins a final card to the lowest branch. Felt drape over the easel base; copper pointer rod leaning against it. Altarpiece symmetry; the quietly wrong detail: the scratched-out branch is still growing a fresh twig off-chart. Cinematic key light, 35mm grain, Bureau filing layer, no faces.