Lui got his start drawing for the local comics industry in the Philippines while working at an international advertising agency. He kept at it, filling his nights and weekends with comic book work, and was eventually hired by Boom Studios to work on their Warhammer titles. Since then, he's done work for Dark Horse Comics' Dark Times series and Red Sonja, Terminator, Thulsa Doom and Warlord of Mars for Dynamite Entertainment. Aside from the comic books, Lui enjoys drawing sketch cards and still does work in advertising.