2x2 网格，为 4 位著名科学家各做一张，16:9 A = { $ SUBJECT 的主要动态速写：全身或焦点裁切，使用粗犷自信的轮…

2x2 grid, do this for 4 famous scientists, 16:9 A = { primary gesture drawing of $ SUBJECT: full‑body or focal crop, with rough confident outlines } B = { secondary studies: expression close‑up, alternate pose fragment, detail crop (accessory/hair) } C = { sketchy shadow blocks: flat cel patches with soft edges, placed on the shadow side of forms } D = { construction lines: leftover guide strokes, perspective marks, circular joints, visible erasures } SKETCH = (A ∩ centerpiece) ∪ (B ∩ scattered_crops) ∪ (C ∩ fill_layer) ∪ (D ∩ transparency) Where: - A is placed prominently, cropped dynamically, with line weight heavier on silhouette contours. - B elements are arranged around A on the white canvas, connected by faint gesture arrows. - C is a Boolean subtraction from the base colour (flat skin/fabric) on regions where light is occluded. - D is rendered as thin, low‑opacity strokes underneath the final ink. Palette: limited to {warm beige, cream, charcoal, cool grey, soft blue, muted skin}. Output: single loose concept art image, blank studio background.

2x2 网格，为 4 位著名科学家各做一张，16:9 A = { $ SUBJECT 的主要动态速写：全身或焦点裁切，使用粗犷自信的轮廓线 } B = { 次要研究：表情特写、备选姿势片段、细节裁切（配饰/头发） } C = { 草图式阴影块：边缘柔和的平涂赛璐璐色块，置于形体的背光一侧 } D = { 结构线：残留的辅助笔触、透视标记、圆形关节、可见的擦除痕迹 } SKETCH = (A ∩ centerpiece) ∪ (B ∩ scattered_crops) ∪ (C ∩ fill_layer) ∪ (D ∩ transparency) 其中： - A 置于显著位置，进行动态裁切，剪影轮廓上的线条更粗。 - B 元素围绕 A 排列在白色画布上，由淡淡的动态箭头连接。 - C 是从底色（平涂的皮肤/织物）上对光被遮挡区域的布尔减法。 - D 以细而低不透明度的笔触绘制，置于最终墨线之下。 配色：仅限于 {暖米色、奶油色、炭黑色、冷灰色、柔蓝色、低饱和肤色}。 输出：单张松散的概念艺术图像，空白工作室背景。