Analysis of information sources in references of the Wikipedia article "Perspective (graphical)" in English language version.
Messer Paolo dal Pozzo Toscanelli, having returned from his studies, invited Filippo with other friends to supper in a garden, and the discourse falling on mathematical subjects, Filippo formed a friendship with him and learned geometry from him.
Over the same period, the development of sophisticated and highly-detailed visual art in Asia arrived at a slightly different solution, now known as the oblique projection. Whereas Roman and subsequent European visual art effectively had multiple and incoherent vanishing points, Asian art usually lacked any vanishing point, but aligned recession in parallel. An important factor here is the use of long scrolls, which even now make fully coherent perspective projection unsuitable.
About 2000 years ago, the Chinese developed dengjiao toushi (等角透視), a graphic tool probably invented by Chinese architects. It came to be known in the West as axonometry. Axonometry was crucial in the development of the Chinese hand scroll painting, an art form that art historian George Rowley referred to as "the supreme creation of Chinese genius". Classic hand scroll paintings were up to ten meters in length. They are viewed by unrolling them from right to left in equal segments of about 50 cm. The painting takes the viewer through a visual story in space and time.
