I didn’t know AGG library this article is referring to. It seems to have a big legacy yet not much is known about the author.
Google Scholar lists several papers with him as co-author, like the ABCD paper at https://pubs.acs.org/doi/pdf/10.1021/ci700267w which has "3DX supports these functions through a highly finessed UI and a superb rendering engine that delivers fast antialiased graphics with subpixel accuracy." citing "Shemanarev, M. The Anti-Grain Geometry Project. http://www.anti- grain.com (accessed June 1, 2006)."