ftp://ftp.uni-heidelberg.de/pub/X11/contrib/applications/xscreensaver-2.07.tar.gz

[xscreensaver] / hacks / glx / README

This directory contains various graphics hacks that requre GL.  These are
independent from the xscreensaver program (in the ../../driver/ directory) 
but some of them use the utility functions found in the ../../utils/ directory.

If you have compilation problems, check the parameters in ../../config.h.