O N E P O I N T P E R S P E C T I V E
T W O P O I N T P E R S P E C T I V E
T H R E E P O I N T P E R S P E C T I V E
Different Perspective drawings.
(So basically, what I have experienced)
It is a mod or a type of drawing in which the visualization power should be at its peak. If the visualization power is proper, then the drawing which you have planned or about to be constructed will come out really well.