His approach combined Dutch realism with the atmospheric qualities of the Roman countryside. In works like 'A Mountainous Landscape with an Arched Bridge over a River', Pynas used a palette of warm browns and cool blues to create depth. He preferred to place small figures within vast natural settings. This method allowed the environment to tell the story as much as the characters themselves. His use of light was direct and clear, avoiding the soft edges found in later Baroque art.

Modern collectors value Pynas for his structured compositions and his role in the development of Dutch art. His paintings offer a sense of order and calm. The earthy tones and clear architectural elements make these prints suitable for contemporary interiors. They provide a window into the early Dutch Golden Age without the heavy ornamentation of later periods. His work represents a specific moment when Northern European artists were first discovering the light of the south.