Structures to be avoided are:—

Those in which the lines all run one way without opposition:

Those especially in which the bottom of the frame is paralleled:

Those in which the perspective of a line or the edge of a mass happens to be a vertical:

Those in which an opposing plane or attractive mass barricades the entrance of the picture:

Those in which two masses in different planes happen to be the same size:

Those in which objects of equal interest occur in the same picture:

Those in which an object awkwardly prolongs a line:

Those in which the line of the background duplicates the lines of the subject:

Those in which the picture is cut by lines too long continued in any direction: