表现背景退浅保留真实边界

提示词

只将指定背景图层的明度提高、对比降低，保留其轮廓、范围和位置。主图内容保持原对比，不用背景退浅删除不方便展示的对象。

Lighten and reduce contrast only in the specified context layer while retaining its outlines, extent, and position. Preserve the main layer’s contrast without using faded context to remove inconvenient objects.