osgcamera -r 5 --vbo cow.osg Which repeats construction of the viewer 5 times in a row, and enables VBO, and on each repeat a new model is loaded. osgcamera -r 2 --vbo --shared cow.osg Which repeats construction of the viewer 2 times in a row, and enables VBO, and on each loads the model once and shares it between each instance of the viewer.