From: Josh Vermaas (
Date: Wed Mar 25 2015 - 09:48:04 CDT

VMD needs to be fed a periodic box size in order for periodic images to be drawn properly. DCD files store box information, but PDB files generally do not. Take a look at the pbctools plugin on how to set the box manually.
-Josh Vermaas

On Mar 25, 2015 7:06 AM, Viswanath Pasumarthi <> wrote:
> Dear VMD Users,
> The periodic tab in the Graphics Representations window displays periodic
> images of the unit cell in the desired direction. Though this function is
> working absolutely  fine when PSF+DCD provided as input, however the same
> is not working when PSF+PDB is provided as the input. What is the reason
> for this behavior?
> Sincerely,
> Viswanath.