This was a usual practice with the great colorists of the Italian Renaissance. Correggio’s pictures, for example, are prized for their golden glow. It is one of the reasons of their beauty. But then, his idea was not to interpret nature. His subjects were drawn from the Bible, or the Christian religion, or Greek Mythology, and he treated them as his imagination suggested. He saw them through the glow of his own imagination, and surrounded them with a glow that seems to place them far away from actual things in a beautiful world of their own. Similarly, modern colorists, when they create pictures out of their own imagination, will suffuse them with an artificial atmosphere that helps to express the spirit of the scene. In fact, these atmospheric effects, produced by glazing, are beautiful and proper in their place. But their place is not in pictures that profess to be studies of nature. In these it is as wrong to suggest an unnatural atmosphere, as it is to leave out all suggestion of atmosphere whatsoever, which is, perhaps, the more usual fault.