Among the Undi sisters, Carla was one of the permanent members and employees of the weaving workshop in Gödöllő. In 1907, she came to Gödöllő as a scholarship recipient, when the weaving school founded by Körösfői-Kriesch became a workshop of the National School of Applied Arts. In 1908, she and her husband, Ferenc Sidló, settled in the city. Later on, she is mentioned as a designer and creator of the workshop drawings. Her watercolors are notables (Cyclamens and Christmas cactus, Forest detail).