His artistic method reflects a shift from the rigid Baroque standards of the seventeenth century toward a more fluid style. In works such as Venus and Adonis, Dieu uses chalk and wash to create soft transitions and balanced figures. His religious scenes, including Priester zegent een knielende vorst, demonstrate a careful study of human interaction and ritual. He preferred clear outlines and avoided the heavy shadows typical of earlier French painting. His approach was technical and measured.

Collectors today appreciate Dieu for the precision of his draughtsmanship and the narrative clarity of his work. His prints and drawings offer a sophisticated look that complements modern decor without cluttering a space. The muted palettes and classical themes provide a sense of historical continuity. His art captures the transition of French taste toward the elegance that would define the era of Louis XV. These works are ideal for those who value the formal beauty of academic French art.