Sirvard Nshanyan
From Immersive Visualization Lab Wiki
In order to convert .tff -> .osga, run:
osgdem -xx 10 --yy 10 -t filename.tif -l 3 -a archiveName.osga
For more information, refer to:
http://www.openscenegraph.com/index.php?page=UserGuides.Osgdem ~/plugins/Image/Image.txt osgdem --help