Native text-to-video. No image reference. No start-frame still. Noir hold. Analog grade, fog crawling through an abandoned glass greenhouse at dusk, one tungsten practical inside, a lone small figure in a yellow slicker walking away. Camera: locked-off. Motion: fog between glass panes, one light flicker. Portrait framing. Grade holds. Held moment, grade and grain unchanged for the whole clip. Avoid: image reference, start-frame still, animate this picture, speed ramp, whip pan, particle bloom, grade shift, talking-head, recipe demo, celebrity, real logos, Leonardo purple, blood, gore, icky dental close-up, nudity, nude, topless, sheer-to-nude, implied nude.