Between 1967 an 1997 Soto investigate, as he said frequently, the ways of share his work with the people in the exhibition of his works. The series of works entitled by "Penetrables" consist in plastic or metal cords hanging from grids which the spectator must traverse. The first Soto's "Penetrable" to also project a virtual volume is the one greeting viewers at the Jeu de Paume exhibition in 1997. In the application below we see some mathematics concept involved in the "Soto's Sphere", obtained when . Changing the values of parameters a, b and c, we can model other "Penetrables", namely, the penetrable that was showed in the last section .