Although vmd ver 1.9 has a vasp plug-in, it does not show the atomic structure as soon as the vasp file is loaded.
After the file loaded, u should set the atom style as CPK.
It can be done by choosing the Graphics tab -> Representation -> Draw style -> Drawing Method : CPK.
Additionally, u had better to set the periodic images appropriately: the Graphics tab -> Representation -> Periodic.
After installation of vmd, I could not find how to visualize the atomic structure of vasp, although the atomic structure of a molecule was clearly visualized as soon as vmd loaded an example *pdb file supplied in the tutorial.tar.gz.
If u want to show cell by lines,
type "pbc box" and enter in the terminal VMD TKConsol; this consol is seen after you turn on the TKcon button and "push menu" in the preference panel.
