Hi I got problem with the Open Inventor driver visualization. Always the "mother" volumes are shown as solid, there is no way to look what is inside, is there something i need to know to run this particular driver?
When the Inventor viewer is in picking mode (set by clicking in the up right arrow icon), you should be able to "expand" a mother by "ctrl-click" the volume, and to "contract" it by shift clicking a daughter volume.