Three-quarter View Measurements (Plate 25).
As there is practically no perspective on the near side of this head at three-quarter view, the same measurements can
be used for indicating heights of the different features (see Plate 23).
The receding portion of the face on the other side is in perspective and will conform with the rules by keeping it in vanishing planes, and by foreshortening each particular feature.
The measurement chart only gives the height and space for features at the starting point; from there onwards perspective will be shown, though only to a very slight degree,
until it reaches the farther side of the face, when the foreshortening becomes more noticeable.
The modelling of the face has been indicated by the shaded spaces, showing : side plane of the temple and cheek; between the eyes and forehead; recess of the eyes under eyebrows ; the sloping plane of the sides of the nose and its base ; cast shadow from the wings of the nose ; the curved recess of the mouth corners ; hollow space under the lower lip and base of chin.
Three-quarter View, Backward Position (Plate 26).
When the head is placed in extreme perspective by movement, comparative measurements can only take place.
When thrown back, as in Plate 26, a large space is allowed for under chin. Eyebrows are brought close to hair line, keeping a fairly straight line. The other features give more