We have a Voxeljet sand/binder 2.5D printer. The interface only reads bitonal bitmap images, one at a time. For more complex forms, it can read a CSV (excel-type table) of ordered layers of PBM (bitmaps). I work on Rhino and produce rather complex forms and can export as STL for a number of printing solutions. However, it cannot export more than one image file and unfortunately only as jpg, pdf or ai, but not as PBM or bmp. I’ve automated contours at successive heights of thickness, but I don’t know how to export as a series of bitmap PBM into a CSV file. Does anyone know a single program solution? Any ideas would be appreciated. Thanks