颗粒与噪点：去除数位的干净感

Take the supplied architectural render, which reads as too clean and digital, and give it photographic imperfection. Add a fine film grain across the entire image at consistent strength, including the sky and the flat surfaces, since grain that appears only in the shadows immediately reads as fake. Detail the grain as slightly stronger in the mid-tones and finer in the brightest highlights, matching how film behaves. Introduce a very slight chromatic aberration at the frame edges — a thin red-cyan fringe on high-contrast edges far from the centre, absent at the middle. Add a gentle overall softening so no edge is mathematically perfect, with the very corners slightly less sharp than the centre as a real lens would be. Detail a faint bloom around the brightest light sources, spreading a soft halo into the neighbouring pixels. Keep every effect subtle enough that a viewer would not name it, only feel that the image looks photographed. Photorealistic, filmic imperfection, subtle.