The distinctive style of Tex Avery influenced the show's artistic look, which includes geometric shapes in both the characters and the background. The style was determined by Povenmire's first sketch of title character Phineas Flynn, who he doodled on the butcher paper covering the table during dinner with his family in a restaurant in South Pasadena, California; he was so taken with the sketch he tore it out, kept it, and used it as the prototype for Phineas and the stylistic blueprint for the whole show. Other than being an executive producer and co-creator, Marsh voices the character of Major Francis Monogram. Marsh based his performance of the character on broadcast journalist and anchorman Walter Cronkite.