内省式灯光艺术家肖像

创作一幅深沉、私密且具有绘画感的自画像，风格参考老大师的素描习作：{argument name="subject" default="一位中年女性艺术家"} 坐在磨损的木桌前，身体前倾面向观众，表情平静、审视且略显疲惫，有着温暖的棕色眼睛、凌乱盘起的深色卷发，身穿一件袖口卷起的褶皱炭灰色亚麻衬衫。构图为竖构图，半身像，四分之三正面视角，面部位于上半部分中心，双手占据下半部分：一只手平放在打开的素描本上，另一只手掌心向上伸出，仿佛在表达某种思考。使用明暗对照法，光源仅来自左下方的一盏发光油灯，将琥珀色的光投射在桌面、脸部、双手和书本上，背景则隐没在深邃的烟蓝色阴影中。包含 6 个清晰可见的主要物体：1 位坐着的人物主体，1 本打开的大型素描本，上面写有模糊的手写笔记和解剖/有机素描，左侧 1 盏点亮的玻璃油灯，左下方 1 个装有画笔或绘图工具的透明玻璃罐，桌子右侧平行放置的 2 支深色钢笔。素描本应展示精致的石墨习作、小型图表和密集的难以辨认的页边笔记，暗示这是一位正在记录内心纹理的艺术家或思想家。渲染效果采用层叠油画质感、炭笔般的划痕、磨损的纸张纹理、柔和的大地色调、赭石色高光、灰褐色织物以及富有表现力的可见笔触。在右下角添加一个小小的手写便签，内容为 {argument name="signature note" default="现在时。"}。氛围：{argument name="mood" default="安静而脆弱，内省，人性化且永恒"}。避免使用干净的数字精修、现代物品、明亮的色彩、微笑、装饰性背景，或除小字便签外可清晰阅读的大段文字。

Create a dark, intimate painterly self-portrait in the style of an old master sketchbook study: {argument name="subject" default="a middle-aged woman artist"} seated at a worn wooden table, leaning forward toward the viewer with a calm, searching, slightly tired expression, warm brown eyes, loose dark curly hair gathered messily back, and a rumpled charcoal-gray linen shirt with rolled sleeves. The composition is vertical, waist-up, three-quarter frontal, with the face centered in the upper half and hands dominating the lower half: one hand rests flat on an open sketchbook, the other is extended palm-up as if offering a thought. Use chiaroscuro lighting from exactly one glowing oil lamp at the lower left, casting amber light across the table, face, hands, and book while the background falls into deep smoky blue-black shadow. Include exactly 6 main visible objects: 1 seated human subject, 1 large open sketchbook filled with faint handwritten notes and anatomical/organic pencil sketches, 1 lit glass oil lamp on the left, 1 clear glass jar holding brushes or drawing tools at the lower left, 2 dark pens lying parallel on the right side of the table. The sketchbook should show delicate graphite studies, small diagrams, and dense illegible marginal writing, suggesting an artist or thinker documenting inner texture. Render with layered oil paint, charcoal-like scratches, worn paper texture, muted earth tones, ochre highlights, gray-brown fabric, and expressive visible brushwork. Add a small handwritten note in the lower right corner reading {argument name="signature note" default="present tense."}. Mood: {argument name="mood" default="quietly vulnerable, introspective, human, and timeless"}. Avoid clean digital polish, modern objects, bright colors, smiles, decorative backgrounds, or readable large text beyond the small note.