Turn a source image (or multi-color mask image) into a 3D-printable bas-relief STL by mapping colors (or grayscale) to heights. Use when you have an image from an image-gen skill (nano-banana-pro, etc.) and want a real, printable model (STL) via a deterministic pipeline.

将源图像（或多色掩模图像）通过将颜色（或灰度）映射为高度，转换为可3D打印的浮雕STL文件。适用于从图像生成工具（如nano-banana-pro等）获取图像后，希望通过确定性流程生成真实可打印的STL模型。