Expression Lens Light Matrix

Create a 4:5 vertical original reference image titled "Expression Lens Light Matrix". Show the same adult original character in a clean 2 by 2 grid with four controlled variations: eye-level soft-light smile, side-glance hard side-light suspicion, high-angle top-light contemplation, and low-angle backlight determination. Keep the same hairstyle and outfit in every cell: short black hair and a light gray crew-neck top. Use no text labels. Let composition, lighting, and expression separate the four cells. Emphasize controlled variables: same character, different camera angle, different light, different emotion. No real brands, watermarks, garbled text, or unrelated logos.

生成一张 4:5 竖版原创人物参考图，主题为「表情镜头光影矩阵」。同一位成年原创角色在 2×2 网格中展示四个变化：平视柔光微笑、侧目硬侧光怀疑、俯视顶光沉思、低角度逆光坚定。四格保持同一发型和服装：黑色短发、浅灰圆领上衣。不要文字标签，只用构图、光线和表情区分四格。重点表现变量控制思路：同一角色、不同镜头、不同光线、不同情绪。不要出现真实品牌、水印、乱码或无关标识。