Point perspective exercise

The perspective exercises showing point perspective in different pictures. From what I gathered from my research, point perspective is done by finding and establishing vanishing points in a picture which is where several straight horizontal lines converge on a point which is the vanishing point. The points are on a horizon line which is found on the point where the land meets the sky or the horizon. The one point pictures only have one vanishing point which I have shown with red lines which show how large a object should be from that distance. Two point is more or less the same except there are two vanishing points on both the left and right with there own sets of lines as shown by the computer tower. Finally three point is the same as the last one except there is a extra vanishing point that is either above or below the object as shown by the computer tower again. The more points of perspective there are the more space is in the image.