Why is this? Well! in the first place, as you remember, there are many artists who do not profess to represent nature. When they use nature as a model, it is for the purpose only of getting the forms of nature, and these they improve upon, as they will tell you, so as to make the forms in their picture “ideally perfect.” These “Academic” or “classic” painters[11] as I have already said, think of art as separate from nature. On the other hand, even among those who think of art as a means of interpreting nature, there are many artists who never put atmosphere into their pictures. Or, if they do, it is not nature’s atmosphere.