If not otherwise specified all files in the OpenSceneGraph-Data are provided free 
for non commericial usage. Comericial users may use the data for testing and development purposes,
but may not distribute these models with commericial products.

Thanks to:

    Image/land_shallow_topo_2048.jpg is slightly lightened version of the
    Nasa blue marble data which is published in the public domain,
    http://earthobservatory.nasa.gov/Newsroom/BlueMarble/

    aferescher.geo and associated images are provided by carbongraphics.com

    osgcool.osg, fountain.osg and cessnafire.osg were provided by Marco Jez.

    cube_mapped_torus.osd and Cubemap_axis/ images were provided by Brede Johansen.
    
    Cubemap_snow/ images provided by Humus - http://esprit.campus.luth.se/~humus/
    
    shaders/ were provided by Mike Weiblen.
    
    The rest of the files are compiled by Don Burns and Robert Osfield.