Claude Viseur set out on his professional career in 1967, starting in cartoons at the Belvision studios in Brussels (Astérix by Uderzo and Goscinny, Lucky Luke by Morris, Tintin by Hergé, etc.). It was at this stage that he chose the name Clovis (a contraction of his first name and surname). A lifelong motorsport enthusiast, he contributes to several Belgian magazines. He met Jean Graton in 1974 and joined his team, where he was given responsibility for creating Michel Vaillant’s cars. He left Graton’s studio in 1981 to devote himself exclusively to illustration (strip cartoons, humorous, realist and advertising plates).