srcset without sizes means a browser assumes 100vw, so a gallery thumbnail in a 16rem column was fetching the 1600px original — the derivative pass was costing bandwidth on the page it exists to save it on. It now picks the 480w variant. sizes is the one part of responsive images the engine cannot supply: it states how wide the picture will *be*, which is a fact about the layout and therefore the theme's. The reference theme states its own measure and nothing more. Lazy loading goes on gallery entries and not on a figure, because a figure is often the first thing on the page and deferring it delays what the reader came for. Both have demo cases, including that the figure is *not* deferred. Queue entry G2, which had been sitting unfixed through the whole Markdown arc.