SceneLib is released with full source code under the GNU Lesser
Public License (LGPL), a `copyleft' license which means that
anyone is free to use and modify the source code but that modified
versions must also be made publically available under the same
terms. The LGPL differs from the standard GNU GPL in that it
permits unmodified versions of SceneLib to be `linked' with
proprietry software without the need to disclose the source code
of the proprietry part. See a full statement of the LGPL here.