The Basics
Three point perspective is much like two point perspective, only the vertical lines are also led back to a vanishing point. Again, see if you can identify the three vanishing points.
Step one - As with the other types of perspective drawing, begin by drawing your three points of perspective, as can be seen to the left.
Step two - Start with your middle line. This will usually be in the middle of the drawing, but not always. Continue by sketching some of the other details, such as the walls of this castle tower.
Step three - Place the rest of the detail onto the sketch and erase the guidelines and vanishing points.