1. A computer enabled method of depicting an image, comprising: at a device having one or more processors and memory: providing a volumetric data-set generated from a scan of a 3 dimensional object, wherein the data-set includes a plurality of elements; applying a transfer function to the volumetric data set to generate a color for each of the elements; accumulating the color of the elements using volume rendering in a local region of each vertex of a polygonal object; mapping a color output of the volume rendering to each vertex of the polygonal object interfacing with elements of the volumetric data-set; displaying the mapped color of the polygonal object; and outputting the mapped color to a 3D printer.