XXXVI
One of the hardest things in the world is to determine how much realism is allowable in any particular picture. It is of so many different kinds too. For instance, I want a shield or a crown or a pair of wings or what not, to look real. Well, I make what I want, or a model of it, and then make studies from that. So that what eventually gets on to the canvas is a reflection of a reflection of something purely imaginary. The three Magi never had crowns like that, supposing them to have had crowns at all, but the effect is realistic because the crown from which the studies were made is real—and so on.
Burne-Jones.