He attended the École des Beaux-Arts at the Sorbonne and studied under Bernand Corman and Lucien Simon (1861–1945).
Lamotte's travels inspired his works, as demonstrated by his cityscapes of Paris, New York, and Tahiti.
Lamotte beautifully captured modern day Parisian city life and street scenes.
Like Pierre Sicard and Grigory Gluckmann, Lamotte was represented by the Dalzell-Hatfield Gallery in Los Angeles, which had an exhibition in 1975.
Lamotte's atelier was located above what is now La Grenouille restaurant[2] where fellow expatriate French artists and famed New York personalities congregated, including Greta Garbo, Charlie Chaplin, and Marlene Dietrich.