3/ Like everything in Domínio PubliCC0's program, PEBBLES is an exhibition of works released entirely under CC0: by the artists' own choice, they belong to the public domain. Each of the 1,000 works can be downloaded in ultra-high resolution (up to 16K), copied, printed, remixed, and reused by anyone, including for commercial purposes, without asking permission and without paying anything. What hangs on the walls is not a reproduction guarded by scarcity, but a shared cultural good that the public is invited to take, transform, and pass on. The curation is organized as a journey through the "anatomy" of a generative collection, revealing layer by layer what usually stays hidden beneath the surface of the image. It opens by explaining, in plain terms, what generative art is and how it is made. It then moves through the traits that compose each Pebble: twenty palettes with evocative names; five densities of color, from the faintest to the most drenched; seven sizes, from the smallest Craglet to the largest Mountlet; the presence or absence of outlines and borders; the way shapes overlap or stand apart; and the rare special elements that punctuate the set. Finally, it arrives at the question that defines this field: how rarity and value emerge within a collection where every work shares the same code.