Follow instruction from github to get the repository https://github.com/cedricpinson/osgexport Blender 2.5+ To install last version of the exporter go in user preference, then 'install addons' with the zip file inside blender-2.5/build/ How to report a bug: send a minimal blender file that produce the problem, and the result osg file. To execute test you will need to install twisted Test blender 2.49 mkdir build-2.49 cd build-2.49 cmake ../blender-2.49 -DTEST=ON -DBLENDER="blender2.49" ctest -V Test blender 2.5 mkdir build-2.5 cd build-2.5 cmake ../blender-2.5 -DTEST=ON -DBLENDER="blender2.5" ctest -V Cedric