Does anyone know of a program that will graph 3d images and contour plots and produce a DVI file for output? We have one that will output in postscript, but it does not do a very good job. Glen Sonnenberg glen at zeus.opt-sci.arizona.edu [128.196.128.219] ..{allegra,cmcl2,hao!noao}!arizona!zeus.opt-sci.arizona.edu!glen