Generate a formal, multi-generational family portrait, envisioned as a classic studio photograph from the 1920s. The scene should feature three distinct generations: dignified grandparents, elegant parents, and well-behaved children. Each individual must be impeccably dressed in period-appropriate 1920s attire, including women in modest flapper-era dresses with drop waists and cloche hats, and men in sharp three-piece suits with fedoras. The family should be posed formally, looking directly at the camera with composed and serene expressions. Render the entire image in rich, warm sepia tones, showcasing a soft focus, a subtle aged paper texture, and a slightly faded appearance characteristic of early 20th-century photography.