product photography of [被写体をここに書く], on a seamless [背景色] backdrop, single large softbox key light from upper left at 45 degrees, soft shadow falling to lower right, subtle rim light separating the subject from the background, no visible light source in frame, shot on 100mm macro lens, f/8, deep focus, entire subject sharp, centered composition, generous negative space around the subject, neutral white balance, colors true to the real object, clean, minimal, catalog style --no props, no hands, no text, no logo, no watermark, no photographer reflection, no clutter in foreground, no dramatic color grading, no vignette 【使い方】 1行目の [被写体] と2行目の [背景色] だけ差し替えて使う。 背景色は light gray / off-white / matte black あたりが失敗しにくい。 影が強すぎるときは single large softbox を two softboxes, key and fill に変える。 まだ硬いときは at 45 degrees を at 30 degrees に下げる。