I can think of no better painting than Hobbema’s the Avenue at Middelharnis (1689 National Gallery London) to start unravelling the mysteries of the vanishing point. The painting is conveniently marked out in a grid board of shapes.Sitting in front of the painting I started with the central triangle that runs through the middle to the vanishing point. I then did the line of horizon followed by marking out the avenue of trees. Note how the tops of the trees echo the triangle of the path way. Use the negative space between the tree tops to help you gauge the distance between them. I then added the net work of fields ,the distant buildings, the foreground trees and finally the figures. I began with a 2B pencil but I had an urge to use colour to give greater definition.