Between 1912 and 1915, Trentini developed his adherence to the Secessionist style and specialized in tempera painting, bringing out in the works of this period the freedom of the brushstroke, the bluntly decorative layout, and the violent color with an anti-naturalistic quality. The accent of Art Nouveau's taste is manifested in fashionable details, in objects of use, such as oriental screens, or emerges through the stylizing of characters. This is the case of the slender young women who are the subjects of the large 1914 painting "The Pearls of the Lake", a work reminiscent of Casorati's three famous "Nudes of Girls" but with an added hint of refined and flamboyant elegance. In the following years, Trentini would gradually break away from this style to carry out more personal research, until his “return to order” with a less adventurous approach in 1925.