His artistic approach favoured clarity and formal poise. He became the preferred portraitist for the Amsterdam elite, including figures like Dirck Hasselaer and Cornelis Pietersz. Hooft. Van der Voort used natural light to define the physical presence of his subjects. He paid close attention to the textures of starched ruffs and heavy fabrics. His work avoided the stiff qualities of earlier portraiture by introducing a lifelike quality to the facial expressions.

Modern collectors appreciate these portraits for their historical accuracy and clean compositions. The neutral tones and focused lighting allow these works to fit into contemporary spaces. These prints offer a direct connection to the individuals who built the Dutch Golden Age. Pieces such as the portrait of Maria Overrijn van Schoterbosch demonstrate a technical precision that provides a strong visual presence in any room.