Who is Maruice Grosser from The Hidden Dimension and what is their importance?

Painter of the twentieth century, primarily in the area of portraiture, Grosser published a book, The Painter's Eye, providing non-artists with an understanding of how painters and sculptors "see" their subjects and why they select specific distances from their subjects in order to create a piece that portrays the correct image to the viewer. The work provided insights into man's perception of distance as a function of social interaction.