The document discusses one-point perspective in Renaissance art. During this time period, artists became interested in creating the illusion of three-dimensional depth in two-dimensional paintings. They used mathematics and observation to develop the technique of linear perspective, which uses vanishing points and orthogonal lines to trick the eye into seeing depth on a flat surface. One-point perspective involves drawing all lines to converge at a single vanishing point located on the horizon line, creating the illusion of objects receding into the distance.