Systems, methods, and other embodiments associated with a server-centric virtual file system that securely provides version control for file system objects associated with the VFS are described. , is stored on a network, each treatment having a storyline connection with all the other treatments. The method finds transformations for applying on the set of identified geometries to remove distortion on the geometries. In the human lumbar model structure, a lower element 112 of an upper lumbar member 11 is formed with a penetration path 34, which axially extends therein and communicates with an inner cavity of an annulus fibrosus member 13 filled with the nucleus pulposus liquid 16 inside.