Most common foreshortenings on y-axis are:[br][math]q_y=\frac{1}{2}[/math] (also called Cavalier-axonometry, if [math]\alpha=45°[/math])[br][math]q_y=\frac{2}{3}[/math][br][math]q_y=\frac{3}{4}[/math][br][math]q_y=1[/math] (other sources call this Cavalier-axonometry, if [math]\alpha=45°[/math])[br][br]Note: there are sources which call any systems of frontal axonometry Cavalier-axonometry, if [math]\alpha=45°[/math] regardless of the foreshortening.[br][br]Note 1: the non-visible lines are not represented.[br]Note 2: in case of foreshortenings bigger than 1, the projected shadow won't appear.