女性の解剖スケッチ（骨格に加筆）
①骨格 ②筋肉＋脂肪 ③作例

筋肉を学ぶと、陰影の塗り分けがその知識に引っ張られがちです。（自分もよくやります）実際は皮下脂肪や筋の個人差があるので、教科書の筋肉図とリファレンスの体表はけっこう違って見えるかと。

体表まで描く場合は、解剖学の知識「だけ」だと硬くなるので、リファレンス写真などを横目で見ながら「肌色の解剖図」にならないように、体表の陰影を決めるようにしています。

Female Anatomy Sketch (with skeletal additions)
①Skeleton ②Muscles + Fat ③Example

When you study muscles, you're often influenced by that knowledge when shading and differentiating tones. (I do it myself quite often.) In reality, because of individual differences in subcutaneous fat and muscle, the muscular diagrams in textbooks look quite different from the surface of the body in reference images.

When drawing down to the body surface, relying "only" on anatomical knowledge can make things feel stiff, so I make it a point to decide on the shading for the body surface while glancing sideways at reference photos and such, to avoid turning it into an "anatomy chart in skin tones."