核桃剖面里的细密褶皱

Natural-history illustration of one open walnut shell half containing its kernel and one closed walnut beside it. Fine watercolor glazing and ink stippling, anatomically plausible folded kernel, clear shell thickness, warm white paper, soft understated cast shadow, no labels. Square 1:1 standalone finished image. No text, logos, watermark, border, multi-panel layout or contact sheet.

博物风插画：半只打开的核桃壳内保留果仁，旁边是一只完整核桃。细水彩罩染与墨点，果仁褶皱形态合理，壳厚清楚，暖白纸底，轻微投影，不要标签。 方形1:1独立完整成图。不要文字、标志、水印、边框、多格排版或联系表。