What is considered to be his most accomplished work during his time in Paris is his 1924 painting entitled, The Spotted Man, which he painted in the Académie Julian studio. The technique used by Wood in this painting is a kind of Seurat-like pointillism. During his stay in Paris he had probably seen the famous pointillism works by Georges Seurat and Paul Signac.
[https://mydailyartdisplay.wordpress.com/2018/06/17/grant-wood-part-1-the-early-years-of-the-american-regionalist-painter/]