The innovation which perspective made towards painting was to create the illusion of three-dimensional space on what was essentially a two-dimensional surface. Linear Perspective employs lines in order to create the impression of three-dimensional space on the artist's canvas. (Read more after Break)
Leon Battista Alberti was the first to develop a coherent system of linear perspective; as is evident from his description of his newly formulated technique in his treatise on painting, his treatise was entitle "De Pictura" - 1435. Alberti's system relied upon/was based on a system of receding parallel lines which would appear to converge at a single point on the Horizon (Line) within the painting's composition - known as the Vanishing Point. An alternative form/approach to perspective was Aerial Perspective.
*Creating the impression of space and depth*