Leonardo da Vinci described three aspects of perspective in painting: 1) the size of objects diminishing with distance (linear perspective), 2) colors changing farther from the eye (atmospheric perspective), and 3) less detailed finishing of distant objects (atmospheric perspective). Filippo Brunelleschi is credited with developing linear perspective around 1425 using a single vanishing point. Perspective techniques include the horizon line, vanishing points, orthogonal and transversal lines, diminution, foreshortening, one-point, two-point, and three-point perspectives, and atmospheric perspective to convey depth.