Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uwm.edu!ux1.cso.uiuc.edu!ux1.cso.uiuc.edu!m.cs.uiuc.edu!sunb4!mcooper
From: mcooper@sunb4.cs.uiuc.edu
Newsgroups: comp.graphics
Subject: Re: 3-d contouring code
Message-ID: <23900009@sunb4>
Date: 3 Aug 90 13:49:00 GMT
References: <1608@idunno.Princeton.EDU>
Lines: 6
Nf-ID: #R:idunno.Princeton.EDU:1608:sunb4:23900009:000:161
Nf-From: sunb4.cs.uiuc.edu!mcooper    Aug  3 08:49:00 1990


XImage from NCSA may do what you want.

to download it, ftp to ftp.ncsa.uiuc.edu

All the programs available there are public domain, and source is available.