This video demonstrates perspective and how to use it to make your drawings more realistic. In this time lapse video, the pencil drawing slowing completes itself. The artist uses many different vanishing points to create the drawing. The drawing consists of several different rooms, along with several different stair cases. The stair cases lead from a bottom floor, up to a main floor, and then finally on to the top floor. The artist has many other videos on YouTube that demonstrate other drawing techniques.