See also the venerable xmountains (possibly already installed on your workstation). Screenshot: https://osde8info.files.wordpress.com/2007/02/6a00d4141b9517685

See also the venerable xmountains (possibly already installed on your workstation). Screenshot: https://osde8info.files.wordpress.com/2007/02/6a00d4141b9517685e00d09e56ce08be2b.jpg https://osde8info.files.wordpress.com/2007/02/6a00d4141b9517... There's a writeup on how it works: http://www2.epcc.ed.ac.uk/~spb/xmountains/about_xmountains.html http://www2.epcc.ed.ac.uk/~spb/xmountains/about_xmountains.h... I don't know how old it is, but the timestamp at the bottom of the HTML file above is 1997.