Matthew Callahan is a self-taught cartoonist and digital artist creating portraits, comics, coloring books and zines.

Matthew tends to focus on shape over detail, and specializes in diverse character designs, overall body positivity, and of course, giant robots.

Since last October he has fully transitioned to digital art, making portraits and comics on a Cintiq drawing tablet with the program, Manga Studio 5.

Matthew made the webcomic "Mattman: Dinosaur Hunter" on and off from 2008 to 2015.