To place furniture in perspective in a room, you first draw a box based on where you are standing in the room. The first image occurs when you are standing at the center of the opposite wall to the door, which means that there is only one vanishing point. The second image occurs when you have moved closer to one of the corners of that wall, such that there are now two vanishing points. To place furniture round a room, first draw in the general rectangular shape of each piece in order to determine its position in perspective. Then, you can fill in the particular details of each object. It seems that once you can draw the basic shapes in perspective, the rest of the drawing becomes much easier and more likely to turn out.