The rules of the universe belong to the artist. All physical properties adhere to the imagination. Imperfection is perfectly organic. Lightness and the dark, flesh and air share common molecules and so bond in image as relatives of the same host, the person holding the paintbrush or pen, pencil or scalpel.
It is the duty of the artist to simply inform the imagination. The results are art. Appreciation of the results is an acceptance of the imagination and the limitlessness implied.