Flow dynamics of normal vs. cancerous capillary. For University of Texas M.D. Anderson Cancer Center Doctorate Student’s Thesis. The image below shows my preliminary pencil sketches that I presented to the client. The first sketch was a full-color sketch that pretty much depicted a representative style suggesting colors and textures that might be used, but significant changes were suggested, which led to the 2nd and 3rd black-and-white pencil sketches, from which the final rendition was produced.