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.
Initial release: deterministic raster bas-relief STL from image (palette/grayscale), uses pillow via cached venv; potrace optional preview