未完成的百叶窗光影人物习作

手工制作的传统美术绘画，明显由人类艺术家创作；在有纹理的纸张上完成的表现性混合媒介作品，非照片写实风格，未经数字润饰。精致地结合石墨铅笔、木炭、软粉彩，以及细微的彩色铅笔／颜料点缀。保留可见的构图线、松散的草图笔迹、探索性的线条、擦除痕迹、重叠的铅笔线、未完成的轮廓，以及艺术家有意停止刻画的区域。

作品应给人以尚未完成但经过有意设计的大师习作之感：一些区域通过细腻的明暗塑造和纹理刻画得十分深入，另一些区域则保持粗略、线稿松散、部分擦除或几乎空白。刻画不均匀是必要的。不要完成每一处表面。让白色／未触及的纸张成为构图的一部分。

以透过百叶窗的强烈定向阳光作为核心视觉元素。通过大面积半透明的色层、成块的木炭笔触、石墨排线和柔和的涂抹色调，以艺术化方式表现阳光与阴影。鲜明的细长光带和阴影斜向／横向掠过主体，边缘有些清晰，有些则融入松散的手绘笔迹中。阴影应让人感到与主体在物理上相连，并自然融入深色背景，而不是看起来像单独投射的图形。

后方／背景应逐渐消融在未完成的纸面和木炭氛围中。轮廓可以化入松散的石墨和木炭笔触。只有少数零散、带有手势感的发丝或线条延伸到轮廓之外，暗示头发／细节，但不将其完整描绘出来。避免过多细节。

构图为极近距离的亲密裁切，只呈现从部分颈部／胸部到前额的区域，主体占据竖幅画面的大部分。优雅的不对称、裁切边缘、大面积未完成的纸面、选择性刻画，以及可见的艺术创作过程。部分面部／物体特征经过细致塑造，而相邻区域仍保留粗略的构图草图。

可见的人工作画痕迹、富有触感的纸纹、石墨粉尘、木炭涂痕、干笔刷痕、铅笔压力变化、不完美的线条、偶然留下的笔迹、擦除痕迹、未完成的边缘、细微的颜料堆积、层层叠加的笔触、富有表现力的排线与交叉排线。作品的美感来自完成区域与未完成区域之间的对比。

博物馆级别的传统艺术习作、当代人物绘画、富有诗意的编辑类美术作品、原生艺术创作过程、克制的自然色调，柔和暖色与石墨灰、木炭黑相融合，富有氛围感、亲密、不完美、手工制作、触感鲜明、情绪安静。
竖幅构图，9:16画幅比例。"

负面提示词
照片写实、超写实、摄影作品、CGI、3D渲染、数字绘画、数字插画、线条过于干净、所有区域都完整刻画、过度润饰、磨皮、光滑肌肤、塑料质感、完美渐变、矢量艺术、光泽表面、人工照明、影棚灯光、细节过多、完成度过高的背景、轮廓过于清晰、对称构图、色彩过度饱和、美颜滤镜、毫无瑕疵的作品、缺乏生气的数字质感

Handmade traditional fine-art drawing, visibly created by a human artist, expressive mixed-media artwork on textured paper, not photorealistic, not digitally polished. A sophisticated combination of graphite pencil, charcoal, soft pastel, and subtle colored pencil/paint accents. Preserve visible construction lines, loose sketch marks, searching strokes, erased traces, overlapping pencil lines, unfinished contours, and areas where the artist has deliberately stopped rendering.

The artwork should feel like an unfinished but intentional master study: some areas highly developed with delicate tonal modeling and texture, while other areas remain rough, loosely sketched, partially erased, or almost blank. Uneven rendering is essential. Do not finish every surface. Let the white/untouched paper become part of the composition.

Use strong directional sunlight filtered through window blinds as a central visual element. Represent the sunlight and shadows artistically through broad translucent washes, charcoal masses, graphite hatching, and soft smudged tones. Distinct elongated bands of light and shadow cross the subject diagonally/horizontally, with some edges sharp and others dissolving into loose hand-drawn marks. The shadow should feel physically connected to the subject, merging naturally with the dark background rather than looking like a separate projected graphic.

The rear/background should gradually disappear into unfinished paper and charcoal atmosphere. The silhouette may dissolve into loose graphite and charcoal strokes. Only a few sparse, gestural strands or linear marks extend beyond the silhouette, suggesting hair/details without fully drawing them. Avoid excessive detail.

Composition is an extreme intimate crop, showing only a partial neck/chest area through the forehead, with the subject occupying most of the vertical frame. Elegant asymmetry, cropped edges, large areas of unfinished paper, selective rendering, visible artistic process. Some facial/object features are carefully modeled while neighboring areas remain in rough construction sketch.

Visible human handwork, tactile paper grain, graphite dust, charcoal smudges, dry-brush marks, pencil pressure variations, imperfect lines, accidental marks, erasure marks, unfinished edges, subtle pigment buildup, layered strokes, expressive hatching and cross-hatching. The beauty comes from the contrast between finished and unfinished areas.

Museum-quality traditional art study, contemporary figurative drawing, poetic editorial fine art, raw artistic process, restrained natural palette, soft warm tones mixed with graphite gray and charcoal black, atmospheric, intimate, imperfect, handmade, tactile, emotionally quiet.
Vertical composition, 9:16 aspect ratio."

Negative prompt
photorealistic, hyperrealistic, photographic, CGI, 3D render, digital painting, digital illustration, perfectly clean lines, fully rendered everywhere, overly polished, airbrushed, smooth skin, plastic texture, perfect gradients, vector art, glossy finish, artificial lighting, studio lighting, excessive detail, finished background, perfectly defined silhouette, symmetrical composition, overly saturated colors, beauty filter, immaculate artwork, sterile digital appearance