Nature is the representation of reality that is the object of any subjective understanding of the Universe. In a matter of perception, the object of nature different from thinking being could be subsumed under nature itself. Then the question arises about human nature which is the instantiation of nature within the thinking being. So nature as being is present within the thinking being as an idea, the object of understanding.
Now is the nature more beautiful than the work of art which is the understanding of reality? So put in other words is the painting of Van Gogh more beautiful than nature as we understand than nature itself? The painting of Van Gogh deals with the meaning lent to nature which in general sense is meaningless. Nature, the study of which is though meaningless so when a Physicist studies nature, he is struggling with meaning, looking for finding meaning. The same is true of Van Gogh who lends meaning to nature. Now is this meaning beautiful than the meaningless nature? Indeed the sunset is beautiful but it is meaningless but when an artist paints the nature he lends meaning to it. Indeed meaning is more desirable than meaninglessness. So nature as painted appears beautiful than the sunset in reality.