From: Josh Vermaas (
Date: Tue Oct 20 2015 - 13:24:13 CDT

Hi Edoardo,

I seem to recall that you can make the resolution arbitrary from the
command line if you just never open an X-window. So you would have a
script that sets it all up and renders (script.tcl), and you'd run it as

vmd -dispdev text -size 1600 1200 -eofexit script.tcl

I don't think there is a way of setting the resolution to be different
from what VMD thinks the display resolution is, but so long as VMD is
run in text-mode, I think it can be arbitrary.


On 10/20/2015 12:45 PM, Edoardo Baldi wrote:
> Hi all,
> I would need to render an image and use the Tachyon-Optix (internal,
> GPU accelerated) renderer. I would like to ask to quesitons:
> 1) How can I set manually the resolution of the output image with the
> Tachyon-Optix internal renderer? Using "-res W H", which works for
> the external Tachyon, gives an error.
> 2) How can I render the image using the internal Tachyon with VMD
> running without the X server (to avoid bandwidth problems when working
> on a remote server)?
> Any help would be really appreciated. Thank you very much,
> Edoardo Baldi