These tone values are only to be perceived in their true relationship by the eye contemplating a wide field of vision. With the ordinary habit of looking only at individual parts of nature, the general impression being but dimly felt, they are not observed. The artist has to acquire the habit of generalising his visual attention over a wide field if he would perceive the true relation of the parts to this scale of values. Half closing the eyes, which is the usual method of doing this, destroys the perception of a great deal of colour. Another method of throwing the eyes out of focus and enabling one to judge of large relationships, is to dilate them widely. This rather increases than diminishes the colour, but is not so safe a method of judging subtle tone relationships.
It is easier in approaching this study out of doors to begin with quiet effects of light. Some of those soft grey days in this country are very beautiful in tone, and change so little that careful studies can be made. And with indoor work, place your subject rather away from the direct light and avoid much light and shade; let the light come from behind you.
If very strong light effects, such as sunlight, or a dark interior lit by one brilliant window, are attempted, the values will be found to be much simpler and more harsh, often resolving themselves into two masses, a brilliant light contrasted with a dark shadow. This tone arrangement of strong light in contrast with dark shadow was a favourite formula with many schools of the past, since Leonardo da Vinci first used it. Great breadth and splendour is given by it to design, and it is one of the most impressive of tone arrangements. Leonardo da Vinci's "Our Lady of the Rocks," in the National Gallery, is an early example of this treatment. And Correggio's "Venus, Mercury, and Cupid," here reproduced, is another particularly fine example. Reynolds and many of the eighteenth-century men used this scheme in their work almost entirely. This strong light and shade, by eliminating to a large extent the half tones, helps to preserve in highly complete work a simplicity and directness of statement that is very powerful. For certain impressions it probably will never be bettered, but it is a very well-worn convention. Manet among the moderns has given new life to this formula, although he did not derive his inspiration directly from Correggio but through the Spanish school. By working in a strong, rather glaring, direct light, he eliminated still further the half tones, and got rid to a great extent of light and shade. Coming at a time when the realistic and plain air movements were destroying simple directness, his work was of great value, bringing back, as it did with its insistence on large, simple masses, a sense of frank design. His influence has been very great in recent years, as artists have felt that it offered a new formula for design and colour. Light and shade and half tone are the great enemies of colour, sullying, as they do, its purity; and to some extent to design also, destroying, as they do, the flatness of the picture. But with the strong direct light, the masses are cut out as simply as possible, and their colour is little sullied by light and shade. The picture of Manet's reproduced is a typical example of his manner. The aggressive shape of the pattern made by the light mass against the dark background is typical of his revolutionary attitude towards all accepted canons of beauty. But even here it is interesting to note that many principles of composition are conformed to. The design is united to its boundaries by the horizontal line of the couch and the vertical line of the screen at the back, while the whole swing hangs on the diagonal from top left-hand corner to right; lower corner, to which the strongly marked edge of the bed-clothes and pillow at the bottom of the picture is parallel.
Plate XLV.
CORREGGIO. VENUS. MERCURY, AND CUPID (NATIONAL GALLERY)
A fine example of one of the most effective tone arrangements; a brilliantly-lit, richly-modelled light mass on a dark background.
Photo Hanfstaengl
Large flat tones give a power and simplicity to a design, and a largeness and breadth of expression that are very valuable, besides showing up every little variety in the values used for your modelling; and thus enabling you to model with the least expenditure of tones. Whatever richness of variation you may ultimately desire to add to your values, see to it that in planning your picture you get a good basic structure of simply designed, and as far as possible flat, tones.