v0.3美术生成记录
工具：内置ImageGen。结果：墨迹图集成功，地面贴图网络失败。没有使用CLI、第三方服务或本地生成模型。
成功源文件：〔本机工程路径〕。
项目副本：assets/textures/ink_brush_atlas_v3.png。四格分别为横向笔锋、弧形笔锋、泼墨、烟墨。引擎按UV选择分区，取反亮度生成透明遮罩；这是实时材质采样，不对生成文件做图像编辑。
最终提示词：
Use case: stylized-concept. Asset type: production VFX texture atlas for a real-time Chinese ink sword-fighting game. Create a square 2048x2048 texture, pure white background, only black and grey ink, no text. Four separate ink marks in an exact equal 2x2 grid. Each mark centered in its own quadrant and fully contained with 12 percent white padding, no overlap across quadrant boundaries. Top left: an expressive horizontal tapered Chinese calligraphy sword-slash brushstroke, rich dry bristle streaks and ragged edges. Top right: an elegant sweeping crescent ink slash, strong black belly tapering sharply into a dry brush tail, open crescent shape. Bottom left: a forceful radial black ink impact splatter, asymmetric small droplets, dense center, feathered capillary edges. Bottom right: a soft smoky ink wash billow, grey diluted ink feathering outward, subtle fibers with lots of white margin. Genuine hand-painted sumi ink on clean white paper, premium sophisticated wuxia art direction, high-frequency bristle detail, strong legible silhouettes, no paper tint, no cast shadows, no outlines, no logos, no characters. This is a mask atlas consumed directly by game shaders, not a game screenshot or poster.地面贴图请求用于圆形石台的俯视基础色，返回网络错误，无输出文件。现有石台使用本项目Shader与几何绘制。