Together with Julio Escámez, Fernando Daza Osorio [es] and Pedro Olmos Muñoz among others, he is considered one of the main representatives of the Chilean muralist movement, largely influenced by Mexican muralism.

His works are often characterized by an engagement of the social and political realities of his time, also linking him with other Chilean artists such as Carlos Hermosilla Álvarez [es] and Pedro Lobos [fr].

[2] In 1933, Venturelli began studying at the Instituto Nacional General José Miguel Carrera in Santiago, and in 1938 started attending evening courses at the School of Fine Arts of the University of Chile.

Venturelli soon became a friend and disciple of Siqueiros, and the two collaborated in the making of a series of murals called Muerte al invasor ("Death to the Invader") at the Escuela México in Chillán in 1941–42.

In November of the same year, Venturelli also participated in a session of the World Peace Council held in Vienna, together with other Latin American representatives such as Pablo Neruda and Jorge Amado.

During his time in China, Venturelli had the opportunity to meet with Mao Zedong and Zhou Enlai, and would also execute a mural depicting scenes from the Korean War at the headquarters of the Chinese section of the World Peace Council.

[1] In 1954, he participated in a collective workshop at the Central Academy of Fine Arts in Beijing, and becoming friends with Chinese artists such as Qi Baishi, Fu Baoshi and Li Keran.