It will be as well to try and explain what is meant by tone values. All

the masses or tones (for the terms are often used interchangeably) that

go to the making of a visual impression can be considered in relation to

an imagined scale from white, to represent the lightest, to black, to

represent the darkest tones. This scale of values does not refer to

light and shade only, but light and shade, colour, and the whole visual

impression are considered as one mosaic of masses of different degrees

of darkness or lightness. A dark object in strong light may be lighter

than a white object in shadow, or the reverse: it will depend on the

amount of reflected light. Colour only matters in so far as it affects

the position of the mass in this imagined scale of black and white. The

correct observation of these tone values is a most important matter, and

one of no little difficulty.

The word tone is used in two senses, in the first place when referring

to the individual masses as to their relations in the scale of "tone

values"; and secondly when referring to the musical relationship of

these values to a oneness of tone idea governing the whole impression.

In very much the same way you might refer to a single note in music as a

tone, and also to the tone of the whole orchestra. The word values

always refers to the relationship of the individual masses or tones in

our imagined scale from black to white. We say a picture is out of value

or out of tone when some of the values are darker or lighter than our

sense of harmony feels they should be, in the same way as we should say

an instrument in an orchestra was out of tone or tune when it was higher

or lower than our sense of harmony allowed. Tone is so intimately

associated with the colour of a picture that it is a little difficult to

treat of it apart, and it is often used in a sense to include colour in

speaking of the general tone. We say it has a warm tone or a cold tone.

There is a particular rhythmic beauty about a well-ordered arrangement

of tone values that is a very important part of pictorial design. This

music of tone has been present in art in a rudimentary way since the

earliest time, but has recently received a much greater amount of

attention, and much new light on the subject has been given by the

impressionist movement and the study of the art of China and Japan,

which is nearly always very beautiful in this respect.

#This quality of tone music is most dominant when the masses are large

and simple#, when the contemplation of them is not disturbed by much

variety, and they have little variation of texture and gradation. A

slight mist will often improve the tone of a landscape for this reason.

It simplifies the tones, masses them together, obliterating many smaller

varieties. I have even heard of the tone of a picture being improved

by such a mist scrambled or glazed over it.

[Illustration: Plate XLIII.

MONTE SOLARO CAPRI

Study on brown paper in charcoal and white chalk.]

The powder on a lady's face, when not over-done, is an improvement for

the same reason. It simplifies the tones by destroying the distressing

shining lights that were cutting up the masses; and it also destroys a

large amount of half tone, broadening the lights almost up to the

commencement of the shadows.

#Tone relationships are most sympathetic when the middle values of your

scale only are used, that is to say, when the lights are low in tone and

the darks high.#

#They are most dramatic and intense when the contrasts are great and the

jumps from dark to light sudden.#

The sympathetic charm of half-light effects is due largely to the tones

being of this middle range only; whereas the striking dramatic effect of

a storm clearing, in which you may get a landscape brilliantly lit by

the sudden appearance of the sun, seen against the dark clouds of the

retreating storm, owes much of its dramatic quality to contrast. The

strong contrasts of tone values coupled with the strong colour contrast

between the warm sunlit land and the cold angry blue of the storm, gives

such a scene much dramatic effect and power.

The subject of values will be further treated in dealing with unity of

tone.

[Sidenote: Variety in Quality and Texture]

Variety in quality and nature is almost too subtle to write about with

any prospect of being understood. The play of different qualities and

textures in the masses that go to form a picture must be appreciated at

first hand, and little can be written about it. Oil paint is capable of

almost unlimited variety in this way. But it is better to leave the

study of such qualities until you have mastered the medium in its more

simple aspects.

The particular tone music of which we were speaking is not helped by any

great use of this variety. A oneness of quality throughout the work is

best suited to exhibit it. Masters of tone, like Whistler, preserve this

oneness of quality very carefully in their work, relying chiefly on the

grain of a rough canvas to give the necessary variety and prevent a

deadness in the quality of the tones.

But when more force and brilliancy are wanted, some use of your paint in

a crumbling, broken manner is necessary, as it catches more light, thus

increasing the force of the impression. Claude Monet and his followers

in their search for brilliancy used this quality throughout many of

their paintings, with new and striking results. But it is at the

sacrifice of many beautiful qualities of form, as this roughness of

surface does not lend itself readily to any finesse of modelling. In the

case of Claude Monet's work, however, this does not matter, as form with

all its subtleties is not a thing he made any attempt at exploiting.

Nature is sufficiently vast for beautiful work to be done in separate

departments of vision, although one cannot place such work on the same

plane with successful pictures of wider scope. And the particular visual

beauty of sparkling light and atmosphere, of which he was one of the

first to make a separate study, could hardly exist in a work that aimed

also at the significance of beautiful form, the appeal of form, as was

explained in an earlier chapter, not being entirely due to a visual but

to a mental perception, into which the sense of touch enters by

association. The scintillation and glitter of light destroys this touch

idea, which is better preserved in quieter lightings.

There is another point in connection with the use of thick paint, that I

don't think is sufficiently well known, and that is, its greater

readiness to be discoloured by the oil in its composition coming to the

surface. Fifteen years ago I did what it would be advisable for every

student to do as soon as possible, namely, make a chart of the colours

he is likely to use. Get a good white canvas, and set upon it in columns

the different colours, very much as you would do on your palette,

writing the names in ink beside them. Then take a palette-knife, an

ivory one by preference, and drag it from the individual masses of paint

so as to get a gradation of different thicknesses, from the thinnest

possible layer where your knife ends to the thick mass where it was

squeezed out of the tube. It is also advisable to have previously ruled

some pencil lines with a hard point down the canvas in such a manner

that the strips of paint will cross the lines. This chart will be of the

greatest value to you in noting the effect of time on paint. To make it

more complete, the colours of several makers should be put down, and at

any rate the whites of several different makes should be on it. As white

enters so largely into your painting it is highly necessary to use one

that does not change.

The two things that I have noticed are that the thin ends of the strips

of white have invariably kept whiter than the thick end, and that all

the paints have become a little more transparent with time. The pencil

lines here come in useful, as they can be seen through the thinner

portion, and show to what extent this transparency has occurred. But

the point I wish to emphasise is that at the thick end the larger body

of oil in the paint, which always comes to the surface as it dries, has

darkened and yellowed the surface greatly; while the small amount of oil

at the thin end has not darkened it to any extent.

Claude Monet evidently knew this, and got over the difficulty by

painting on an absorbent canvas, which sucks the surplus oil out from

below and thus prevents its coming to the surface and discolouring the

work in time. When this thick manner of painting is adopted, an

absorbent canvas should always be used. It also has the advantage of

giving a dull dry surface of more brilliancy than a shiny one.

Although not so much as with painting, varieties of texture enter into

drawings done with any of the mediums that lend themselves to mass

drawing; charcoal, conté crayon, lithographic chalk, and even red chalk

and lead pencil are capable of giving a variety of textures, governed

largely by the surface of the paper used. But this is more the province

of painting than of drawing proper, and charcoal, which is more painting

than drawing, is the only medium in which it can be used with much

effect.

[Sidenote: Variety of Edges.]

There is a very beautiful rhythmic quality in the play from softness to

sharpness on the edges of masses. A monotonous sharpness of edge is

hard, stern, and unsympathetic. This is a useful quality at times,

particularly in decorative work, where the more intimate sympathetic

qualities are not so much wanted, and where the harder forms go better

with the architectural surroundings of which your painted decoration

should form a part. On the other hand, a monotonous softness of edge is

very weak and feeble-looking, and too entirely lacking in power to be

desirable. If you find any successful work done with this quality of

edge unrelieved by any sharpnesses, it will depend on colour, and not

form, for any qualities it may possess.

Some amount of softness makes for charm, and is extremely popular: "#I

do# like that because it's so nice and soft" is a regular show-day

remark in the studio, and is always meant as a great compliment, but is

seldom taken as such by the suffering painter. But a balance of these

two qualities playing about your contours produces the most delightful

results, and the artist is always on the look out for such variations.

He seldom lets a sharpness of edge run far without losing it

occasionally. It may be necessary for the hang of the composition that

some leading edges should be much insisted on. But even here a

monotonous sharpness is too dead a thing, and although a firmness of run

will be allowed to be felt, subtle variations will be introduced to

prevent deadness. The Venetians from Giorgione's time were great masters

of this music of edges. The structure of lines surrounding the masses on

which their compositions are built were fused in the most mysterious and

delightful way. But although melting into the surrounding mass, they are

always firm and never soft and feeble. Study the edge in such a good

example of the Venetian manner as the "Bacchus and Ariadne" at the

National Gallery, and note where they are hard and where lost.

There is one rather remarkable fact to be observed in this picture and

many Venetian works, and this is that the #most accented edges are

reserved for unessential parts#, like the piece of white drapery on the

lower arm of the girl with the cymbals, and the little white flower on

the boy's head in front. The edges on the flesh are everywhere fused and

soft, the draperies being much sharper. You may notice the same thing in

many pictures of the later Venetian schools. The greatest accents on the

edges are rarely in the head, except it may be occasionally in the eyes.

But they love to get some strongly-accented feature, such as a

crisply-painted shirt coming against the soft modelling of the neck, to

balance the fused edges in the flesh. In the head of Philip IV in our

National Gallery the only place where Velázquez has allowed himself

anything like a sharp edge is in the high lights on the chain hanging

round the neck. The softer edges of the principal features in these

compositions lend a largeness and mystery to these parts, and to restore

the balance, sharpnesses are introduced in non-essential accessories.

In the figure with the white tunic from Velázquez's "Surrender of

Breda," here reproduced, note the wonderful variety on the edges of the

white masses of the coat and the horse's nose, and also that the

sharpest accents are reserved for such non-essentials as the bows on the

tunic and the loose hair on the horse's forehead. Velázquez's edges are

wonderful, and cannot be too carefully studied. He worked largely in

flat tones or planes; but this richness and variety of his edges keeps

his work from looking flat and dull, like that of some of his followers.

I am sorry to say this variety does not come out so well in the

reproduction on page 194 [Transcribers Note: Plate XLIV] as I could

have wished, the half-tone process having a tendency to sharpen edges

rather monotonously.

This quality is everywhere to be found in nature. If you regard any

scene pictorially, looking at it as a whole and not letting your eye

focus on individual objects wandering from one to another while being

but dimly conscious of the whole, but regarding it as a beautiful

ensemble; you will find that the boundaries of the masses are not hard

continuous edges but play continually along their course, here melting

imperceptibly into the surrounding mass, and there accentuated more

sharply. Even a long continuous line, like the horizon at sea, has some

amount of this play, which you should always be on the look out for. But

when the parts only of nature are regarded and each is separately

focussed, hard edges will be found to exist almost everywhere, unless

there is a positive mist enveloping the objects. And this is the usual

way of looking at things. But a picture that is a catalogue of many

little parts separately focussed will not hang together as one visual

impression.

[Illustration: Plate XLIV.

PART OF THE SURRENDER OF BREDA. BY VELÁZQUEZ

Note the varied quantity of the edge in white mass of tunic. (The

reproduction does not unfortunately show this as well as the original.)

_Photo Anderson_]

In naturalistic work the necessity for painting to one focal impression

is as great as the necessity of painting in true perspective. What

perspective has done for drawing, the impressionist system of painting

to one all-embracing focus has done for tone. Before perspective was

introduced, each individual object in a picture was drawn with a

separate centre of vision fixed on each object in turn. What perspective

did was to insist that all objects in a picture should be drawn in

relation to one fixed centre of vision. And whereas formerly each object

was painted to a hard focus, whether it was in the foreground or the

distance, impressionism teaches that you cannot have the focus in a

picture at the same time on the foreground and the distance.

Of course there are many manners of painting with more primitive

conventions in which the consideration of focus does not enter. But in

all painting that aims at reproducing the impressions directly produced

in us by natural appearances, this question of focus and its influence

on the quality of your edges is of great importance.

Something should be said about the serrated edges of masses, like those

of trees seen against the sky. These are very difficult to treat, and

almost every landscape painter has a different formula. The hard, fussy,

cut-out, photographic appearance of trees misses all their beauty and

sublimity.

There are three principal types of treatment that may serve as examples.

In the first place there are the trees of the early Italian painters,

three examples of which are illustrated on page 197 [Transcribers Note:

Diagram XXIII]. A thin tree is always selected, and a rhythmic pattern

of leaves against the sky painted. This treatment of a dark pattern on a

light ground is very useful as a contrast to the softer tones of flesh.

But the treatment is more often applied nowadays to a spray of foliage

in the foreground, the pattern of which gives a very rich effect. The

poplar trees in Millais' "Vale of Rest" are painted in much the same

manner as that employed by the Italians, and are exceptional among

modern tree paintings, the trees being treated as a pattern of leaves

against the sky. Millais has also got a raised quality of paint in his

darks very similar to that of Bellini and many early painters.

Giorgione added another tree to landscape art: the rich, full,

solidly-massed forms that occur in his "Concert Champêtre" of the

Louvre, reproduced on page 151 [Transcribers Note: Plate XXXIII]. In

this picture you may see both types of treatment. There are the

patterns of leaves variety on the left and the solidly-massed treatment

on the right.

[Illustration: Diagram XXIII.

EXAMPLES OF EARLY ITALIAN TREATMENT OF TREES

A. From pictures in Oratorio di S. Ansano. "Il trionfo dell' Amore,"

attributed to Botticelli.

B. From "L'Annunziazione," by Botticelli, Uffizi, Florence.

C. From "La Vergine," by Giovanni Bellini in the Accademia, Venice.]

Corot in his later work developed a treatment that has been largely

followed since. Looking at trees with a very wide focus, he ignored

individual leaves, and resolved them into masses of tone, here lost and

here found more sharply against the sky. The subordinate masses of

foliage within these main boundaries are treated in the same way,

resolved into masses of infinitely varying edges. This play, this

lost-and-foundness at his edges is one of the great distinguishing

charms of Corot's trees. When they have been painted from this mass

point of view, a suggestion of a few leaves here and a bough there may

be indicated, coming sharply against the sky, but you will find this

basis of tone music, this crescendo and diminuendo throughout all his

later work (see illustration, page 215 [Transcribers Note: Diagram

XXVI]).

These are three of the more extreme types of trees to be met with in

art, but the variations on these types are very numerous. Whatever

treatment you adopt, the tree must be considered as a whole, and some

rhythmic form related to this large impression selected. And this

applies to all forms with serrated edges: some large order must be found

to which the fussiness of the edges must conform.

The subject of edges generally is a very important one, and one much

more worried over by a master than by the average student. It is

interesting to note how all the great painters have begun with a hard

manner, with edges of little variety, from which they have gradually

developed a looser manner, learning to master the difficulties of design

that hard contours insist on your facing, and only when this is

thoroughly mastered letting themselves develop freely this play on the

edges, this looser handling.

For under the freest painting, if it be good, there will be found a

bed-rock structure of well-constructed masses and lines. They may never

be insisted on, but their steadying influence will always be felt. So

err in your student work on the side of hardness rather than looseness,

if you would discipline yourself to design your work well. Occasionally

only let yourself go at a looser handling.

[Sidenote: Variety of Gradiation.]

Variety of gradation will naturally be governed largely by the form and

light and shade of the objects in your composition. But while studying

the gradations of tone that express form and give the modelling, you

should never neglect to keep the mind fixed upon the relation the part

you are painting bears to the whole picture. And nothing should be done

that is out of harmony with this large conception. It is one of the most

difficult things to decide the amount of variety and emphasis allowable

for the smaller parts of a picture, so as to bring all in harmony with

that oneness of impression that should dominate the whole; how much of

your scale of values it is permissible to use for the modelling of each

individual part. In the best work the greatest economy is exercised in

this respect, so that as much power may be kept in reserve as possible.

You have only the one scale from black to white to work with, only one

octave within the limits of which to compose your tone symphonies. There

are no higher and lower octaves as in music to extend your effect. So be

very sparing with your tone values when modelling the different parts.

XIV

UNITY OF MASS

What has been said about unity of line applies obviously to the outlines

bounding the masses, so that we need not say anything further on that

subject. The particular quality of which something should be said, is

the unity that is given to a picture by means of a well-arranged and

rhythmically considered scheme of tone values.

The modifications in the relative tone values of objects seen under

different aspects of light and atmosphere are infinite and ever varying;

and this is quite a special study in itself. Nature is the great teacher

here, her tone arrangements always possessing unity. How kind to the eye

is her attempt to cover the ugliness of our great towns in an envelope

of atmosphere, giving the most wonderful tone symphonies; thus using

man's desecration of her air by smoke to cover up his other desecration

of her country-side, a manufacturing town. This study of values is a

distinguishing feature of modern art.

But schemes taken from nature are not the only harmonious ones. The

older masters were content with one or two well-tried arrangements of

tone in their pictures, which were often not at all true to natural

appearances but nevertheless harmonious. The chief instance of this is

the low-toned sky. The painting of flesh higher in tone than the sky was

almost universal at many periods of art, and in portraits is still

often seen. Yet it is only in strong sunlight that this is ever so in

nature, as you can easily see by holding your hand up against a sky

background. The possible exception to this rule is a dark storm-cloud,

in which case your hand would have to be strongly lit by some bright

light in another part of the sky to appear light against it.

This high tone of the sky is a considerable difficulty when one wishes

the interest centred on the figures. The eye instinctively goes to the

light masses in a picture, and if these masses are sky, the figures lose

some importance. The fashion of lowering its tone has much to be said

for it on the score of the added interest it gives to the figures. But

it is apt to bring a heavy stuffy look into the atmosphere, and is only

really admissible in frankly conventional treatment, in which one has

not been led to expect implicit truth to natural effect. If truth to

natural appearances is carried far in the figures, the same truth will

be expected in the background; but if only certain truths are selected

in the figures, and the treatment does not approach the naturalistic,

much more liberty can be taken with the background without loss of

verisimilitude.

But there is a unity about nature's tone arrangements that it is very

difficult to improve upon; and it is usually advisable, if you can, to

base the scheme of tone in your picture on a good study of values from

nature.

Such effects as twilight, moonlight, or even sunlight were seldom

attempted by the older painters, at any rate in their figure subjects.

All the lovely tone arrangements that nature presents in these more

unusual aspects are a new study, and offer unlimited new material to

the artist. Many artists are content to use this simply for itself, the

beauty of a rare tone effect being sufficient with the simplest

accessories to make a picture. But in figure composition, what new and

wonderful things can be imagined in which some rare aspect of nature's

tone-music is combined with a fine figure design.

These values are not easily perceived with accuracy, although their

influence may be felt by many. A true eye for the accurate perception of

subtle tone arrangements is a thing you should study very diligently to

acquire. How then is this to be done? It is very difficult, if not

impossible, to teach anybody to see. Little more can be said than has

already been written about this subject in the chapter on variety in

mass. Every mass has to be considered in relation to an imagined tone

scale, taking black for your darkest and white for your highest light as

we have seen. A black glass, by reducing the light, enables you to

observe these relationships more accurately; the dazzling quality of

strong light making it difficult to judge them. But this should only be

used to correct one's eye, and the comparison should be made between

nature seen in the glass and your work seen also in the glass. To look

in a black glass and then compare what you saw with your work looked at

direct is not a fair comparison, and will result in low-toned work with

little brilliancy.

The Practice and Science of Drawing · 第 11 / 17 段