In the 1940s the style became more sketchy and the portraits and still lifes (especially flowers) evolved into abstract compositions. In the late 1940s she incorporated elements of Picasso and Braque into her paintings, like her fellow townsman from Oudenaarde Jules Boulez.Her work was related to that of the so-called " Young Belgian Painting " and to the group Cobra . A few years later, she began mixing sand and grains into her works to give her compositions shape and form. This blend of color and sand increasingly took on abstract forms, sometimes purely abstract colors , sometimes tending towards the figurative. In the 1980s her tachic style diminished and was replaced by elliptical paths in space, which crossed or connected to form a unity.

“Suzanne Thienpont's art is truly unique. Besides color, she also uses "sand" to give shape and form to her compositions. Therefore, her work must be viewed from a very specific perspective. With sand as the main element, she has also incorporated the entire world of the sea and dunes into her work. Perhaps it is precisely such apparitions and shapes that fuel our imagination when we think of life at the bottom of the sea. They could just as easily be skeletons as plants ravaged by erosion. The themes are rich and varied, always on the border between figuration and defiguration. The figures are challenging, visionary, often even prehistoric. And within all of this, her work reveals a clear predilection for poetic atmosphere. The colors are softly restrained by the sand. Shells and pebbles create more prominent surfaces.” (Excerpt from Flanders. Art magazine. Volume 19(1970))