CHAPTER VII.
GLASS PAINTING (RENAISSANCE).

The quality par excellence of Renaissance glass was its painting; its dependence upon paint was its defect. Until about the middle of the sixteenth century the painter goes on perfecting himself in his special direction, neglecting, to some extent, considerations of construction on the one hand, and of colour upon the other, which cannot with impunity be ignored in glass, but achieving pictorially such conspicuous success that there may be question, among all but ardent admirers of glass that is essentially glass-like, as to whether the loss, alike in depth and in translucency of colour, as well as of constructional fitness, may not be fully compensated for by the gain in fulness of pictorial expression. According as we value most the qualities of glass in glass, or the qualities of a picture in no matter what material, will our verdict be. But there comes a point when the painter so far oversteps the limit of consistency, so clearly attempts to do in glass what cannot be done in it, so plainly sacrifices to qualities which he cannot get the qualities which stained glass offers him, that he ceases to be any longer working in glass, and is only attempting upon glass what had very much better have been done in some other and more congenial medium.

The event goes to prove the seductiveness of the pictorial idea, and illustrates once more the danger of calling to your assistance a rival craft, which, by-and-by, may oust you from your own workshop. The consideration of the possibilities in the way of pictorial glass is reserved for a chapter by itself. It concerns us for the moment only in so far as the pictorial intention affected, as it very seriously did, the technique of glass painting.

In pursuit of the pictorial the painter strayed from his allegiance to glass. He learnt to depend upon his manipulation instead of upon his material; and that facility of his in painting led him astray. He not only began to use paint where before he would, as a matter of course, have glazed-in coloured glass, but to lay it on so heavily as seriously to detract from that translucency which is the glory of glass.

It is rash to say, at a glance, whether glass has been too heavily painted or not. I once made a careful note, in writing, that certain windows in the church of S. Alpin, at Châlons, were over-painted. After a lapse of two or three years I made another equally careful note to the effect that they were thin, and wanted stronger painting. It was not until, determined to solve the mystery of these contradictory memoranda, I went a third time to Châlons, that I discovered, that with the light shining full upon them the windows were thin, that by a dull light they were heavy, and that by a certain just sufficiently subdued light they were all that could be desired. There is indiscretion, at least, in painting in such a key that only one particular light does justice to your work; but the artist in glass is always very much at the mercy of chance in this respect. He cannot choose the light in which his work shall be seen, and the painter of Châlons may have been more unfortunate than in any way to blame. There comes, however, a degree of heaviness in painted glass about which there can be no discussion. When the paint is laid on so thick that under ordinary conditions of light the glass is obscure, or when it is so heavy that the light necessary to illuminate it is more than is good for the rest of the window, the bounds of moderation have surely been passed. And in the latter half of the sixteenth century it was less and less the custom to take heed of considerations other than pictorial; so that by degrees the translucency of glass was sacrificed habitually to strength of effect depending not so much upon colour, which is the strength of glass, as upon the relief obtained by shadow—just the one quality not to be obtained in glass painting. For the quality of shadow depends upon its transparency; and shadow painted upon glass, through which the light is to come, must needs be obscure, must lack, in proportion as it is dark, the mysterious quality of light in darkness, which is the charm of shadow. The misuse of shading which eventually prevailed may best be explained by reference to its beginnings, already in the first half of the century, when most consummate work was yet being done. For example, in the masterpieces of Bernard van Orley, at S. Gudule, Brussels—one of which is illustrated [overleaf]; it is a mere diagram, giving no idea of the splendour of the glass, but it is enough to serve our purpose.

The execution of the window is, in its kind, equal to the breadth and dignity of the design. The painter has done, if not quite all that he proposed to do, all that was possible in paint upon glass. Any fault to find in him, then, must be with what he meant to do, not what he did. To speak justly, there is no fault to find with any one, but only with the condition of things. We have here, associated with the glass painter, a more famous artist, the greatest of his time in Flanders, pupil of Michael Angelo, court painter, and otherwise distinguished. It was not to be expected that he should be learned in all the wisdom of the glass painter, nor yet, human nature being what it is, that he should submit himself, lowly and reverently, to the man better acquainted with the capacities of glass. All that the glass painter could do was to translate the design of the master into glass as best he might, not perhaps as best he could have done had there been no great master to consult in the matter.

This was not the first time, by any means, that the designer and painter of a window were two men. There is no saying how soon that much subdivision of labour entered the glass worker’s shop; but so long as they were both practical men, versed each in his art, and, to some extent, each in the technique of the other, it did not so much matter. When the painter from outside was called in to design, it mattered everything. What could he be expected to care for technique other than his own? What did he know about it? He was only an amateur so far as glass was concerned; and his influence made against workmanlikeness. He may have done marvels; he did marvels; but his very mastery made things worse. He bore himself so superbly that it was not seen what dangerous ground he trod on. Lesser men must needs all stumble along in his footsteps, until they fell; and in their fall they dragged their art with them.