There was no commercial software, no computer at disposal of the artists or simply accessible, no status for the artist programmer nor a specific research laboratory. A first solution: to leave to United States, where we found some directors of laboratory capable of offering a research environment to a computer artist.What was impossible in France at that time. And so we were generously welcomed in the " Production Automation Project " of the University of Rochester, steered by Herbert Voelcker and Aristide Requicha, during year 1981-1982. A computer VAX 780 of Digital was suddenly accessible , without prevention of no sort, what seemed to us almost incredible... With the support of a good research environment in particular that of the director Aristides Requicha, we developed the bases of modelling and rendering of our software RODIN.