His approach to painting focused on the physical presence of livestock within the natural environment. In works like Landscape with Cows or The Mill, Van Marcke avoided the sentimental depictions common in earlier pastoral scenes. He prioritised the anatomical structure of the animals and the atmospheric effects of the weather. His compositions often use light to define the texture of a cow's hide or the dampness of the earth. This realism earned him several medals at the Paris Salon, as he captured the quiet weight of rural life.

Modern collectors value these prints for their muted colour palettes and calm subject matter. The earth tones and soft lighting make his work suitable for spaces that require a sense of stillness. Pieces such as The Flood Gate offer a window into a slower pace of life without relying on romanticised imagery. His paintings provide a connection to the traditional French countryside, making them a staple for those seeking a classic aesthetic in their home.