His "Perspectivae libri sex" provided a definitive and often original analysis of the mathematics of perspective projection, in a far more extended way than either Commandino or Benedetti had aimed to do.
Kanyang "Perspectivae libri sex" na ibinigay ng isang tukoy at madalas na orihinal na pagtatasa ng matematika ng perspektibo projection, sa isang paraan na pinalawak na mas malayo kaysa sa alinman sa Commandino o Benedetti naglalayong had to do.