手绘覆描与底图可区分

提示词

在给定底图上添加指定手绘覆描，原图保持浅淡可辨，新增笔触与底图风格分开。覆描只表达已说明的想法，不修改原图尺寸或假装是确认图纸。

Add the requested hand-drawn overlay to the supplied base, keeping the original faint but legible and visually distinct from new strokes. Show only the stated ideas without changing base dimensions or presenting the sketch as approved documentation.