This. You have not seen Van Gogh's paintings until you've seen them in person. He heaps on gops of paint on his canvasses, and the third dimension is an aspect

This. You have not seen Van Gogh's paintings until you've seen them in person. He heaps on gops of paint on his canvasses, and the third dimension is an aspect of the paintings that cannot be appreciated fully in 2D reproductions. As a corollary, the lighting of a painting is an important aspect of viewing it, as the angle of light will affect highlights and shadows, especially for some paintings which use glossy paints.