Robert Frans Marie De Moor, better known under his pen name Bob de Moor, was a Belgian comics creator. Chiefly noted as an artist, he is considered an early master of the Ligne claire style. He wrote and drew several comics series on his own, but also collaborated with Hergé on several volumes of The Adventures of Tintin. He completed the unfinished story Professor Sató's Three Formulae, Volume 2: Mortimer vs. Mortimer of the Blake and Mortimer series, after the death of the author Edgar P. Jacobs.

Ligne claire is a style of drawing created and pioneered by Hergé, the Belgian cartoonist and creator of The Adventures of Tintin. It uses clear strong lines sometimes of varied width and no hatching, while contrast is downplayed as well. Cast shadows are often illuminated, and the style often features strong colours and a combination of cartoonish characters against a realistic background. The name was coined by Joost Swarte in 1977.