Hello everyone - I attended the NSS annual convention in Cookeville, TN last week. There was a very interesting presentation on a 3D cave viewing software that might be interesting to this group. The web site is https://breakoutcavesurvey.com The program is pure Java, so it requires a Java Runtime Environment of some kind. The whole thing is just one .jar file. The demonstration was on a Mac laptop. It starts on my desktop running Fedora 30, but gives an OpenGL error on my laptop. There are probably some missing libraries of some kind. The developer said that it will run on Windows. The viewer knows how to deal with Compass and Walls files. Therion can output a Compass PLT file, so should be able to feed Breakout. I have not tried this yet. -- Bill Gee