Living in a port town, he developed a strong interest for drawing sailing ships which carried into his professional career with his Cori, de Scheepsjongen series and other work.

[2] Following studies at the Antwerp Academy of Fine Arts, De Moor started his career at the Afim animations studios.

[3] Beginning in March 1951, starting with Destination Moon, he began a collaboration with Hergé on Tintin albums and Tintin-related material which included extensive work on sketch studies, backgrounds, layout, and ultimately animated films.

· While Hergé was on a trip in the summer of 1965, a reporter for the Swiss magazine L’illustré asked De Moor and Jacques Martin if any progress had been made on a new Tintin adventure.

Without Hergé's knowledge, the pair created a fake page that they managed to pass off as a genuine extract from an unfinished Tintin book.