Model Converter
Standalone tool for converting OpenSceneGraph (.osgb, .osg, .ive) models to GLB format.
Usage
Download exe from link above and place in a folder
Add the .osgb file you want to convert to the folder containing osg-converter.exe. In the folder address bar type in cmd to open a command prompt here (or just open a command prompt and use cd to change the directory to this folder).
In the command prompt window add this line:
osg-converter input.osgb -o output.glb
Where "input" is the name of the osgb file you want to convert and "output" is the output glb file