OpenCSG is available under the GNU General Public License, either
version 2, or since OpenCSG version 1.5.0 - at your option - any
later version.

Please read these files for the full licenses.
doc/license/gpl-2.0.txt
doc/license/gpl-3.0.txt

Note that OpenCSG comes with code that is not copyrighted by me,
in particular GLEW (http://glew.sourceforge.net)
These libraries are licensed under the terms of their respective authors. 

2023, Florian Kirsch
