[Along the Shore--Photo by George Butler (Transitional line); Pathless--Photo by A. Horsely Hinton (Transitional Line)]
In landscape the transitional line from land into sky is often impossible and objectionable. The sentiment of the subject may deny any attempt at this union. Here the principle only, should be hinted at. In the case of a sunset sky where the clouds float as parallel bars above the horizon and thus show the character of a quiet and windless closing of day, a transitional line such as a tree, mast or spire may be unavailable. Oppositional spots or lines attracting the vision into the land and thus diverting it from the horizontals are the only _recourse_. In the shore view the sun’s rays create a series of lines which admirably unite with the curve of the wagon tracks. The union of sky and land is thus effected and meanwhile the subject proper has its ruggedness associated with the graceful compass of these elements.
In fact transitional line is so powerful that unless it contains a part of the subject it should seldom be used.
In the _“__Annunciation__”_ by Botticelli the introduction of a long perspective line beyond the figures, continuing the lines of the foreground, railroads the vision right through the subject, carrying it out of the picture. If the attention is pinned perforce on the subject, one feels the interruption and annoyance of this unnecessary landscape. The whole Italian school of the Renaissance weakened the force of its portraits and figure pictures by these elaborate settings which they seemed helpless to govern. In Velasquez we frequently find the simplification of background which saves the entire interest for the subject; but even he in his “Spinners” and to a lesser degree in some other compositions, makes the same error. In the greatest of Rembrandt’s portrait groups, “The Syndics,” his problem involved the placement of six figures. Four are seated at the far side of a table looking toward us, the fifth, on the near side, rises and looks toward us. His head, higher than those of the row of four, breaks this line of formality; but the depth and perspective of the picture is not secured until the figure standing in the background is added. This produces from the foreground figure, through one of the seated figures, the transitional line which pulls the composition forward and backward and makes a circular composition of what was commenced upon a line sweeping across the entire canvas.