His paintings were the culmination of many preparatory drafts in gouaches, multiple versions of which are works in themselves and reflect his penchant for colors and inventive shapes.

He performed the works of Debussy, Ravel, Fauré, and Satie at major concerts and in churches, and had a decisive influence on the career of André Jolivet.

Valmier was drafted into the military in 1914 and assigned to service in Toul, where he became acquainted with Albert Gleizes, Paul Colin, and the composer Florent Schmitt.

(Albert Gleizes, Souvenirs, c. 1942)[1][2][3][4]Upon his return to Montmartre in 1918, Valmier met Léonce Rosenberg, who soon recognized the high quality of his work and took him under contract.

In 1928, Rosenberg entrusted him with the decoration of the dining room of his apartment at rue de Longchamp in Paris, which also houses his art collection.