Dear all, for teaching purposes (and not only), I would be highly interested in finding a PC software capable ofdisplaying the 3-D interference patterns of generations of folds of any orientation. Any suggestion of freeware or cheap softwares? I would much appreciate any help. Thank you Giulio Dr. Giulio Viola Dep. of Geological Sciences University of Cape Town 7701 Rondebosch South Africa Tel: 0027-21-6502928 Fax: 0027-21-6503783 e-mail: [log in to unmask]