From 1905 he travelled to Madrid where he met Juan Gris and immersed himself in the painting styles of Velasquez and Goya.

In 1908, Kars arrived in Paris and settled in Montmartre at the time of the Cubist revolution, which also had an influence on his work,[6] and he met Suzanne Valadon and Maurice Utrillo.

He renewed his friendship with Pascin and frequented Chagall, Apollinaire, Max Jacob, the art critic Maurice Raynal and the Greek painter Demetrius Galanis.

Away from France, he made a large number of drawings and paintings depicting refugees seeking shelter.

Pierre Levy, a French industrialist and art collector, and Oscar Ghez acquired an important part of the artworks.