VMD-L Mailing List

From: Geist, Norman (norman.geist_at_uni-greifswald.de)
Date: Thu Sep 26 2019 - 03:14:48 CDT

Hey John,

sorry for the late reply. Due to some movements going on, I currently
only have my remote GPU system available running over VNC and
VirtuaGL. These machines have two Tesla k20m and the driver version is
 375.39

As said before, the non interactive version works with the alpha
channel output and the interactive renderer works with VMD-1.9.3 but
not with 1.9.4 showing only a black screen and "empty" image, only
seem to contain the transparent bg.

Bests
Norman Geist

Am Donnerstag, den 19-09-2019 um 17:13 schrieb John Stone:

Norman,
  Do you observe that behavior every time?  It works fine for me
and on all
of the machines here in our lab, and it should also for everyone else,

but maybe you've found a bug somehow.  Which VMD build are you
running,
what GPU did you run it on, and what NVIDIA driver version does your
machine have installed?  

Best,
  John Stone
  vmd_at_ks.uiuc.edu

On Thu, Sep 19, 2019 at 11:13:05AM +0200, Norman Geist wrote:
> Hey John,
>
> very cool new feature with that alpha channel output. I immediately
tried it
> and it perfectly worked with the Tachyon Optix Internal, however it
didn't
> work tough with the Interactive renderer. The interactive rendering
window
> is just black and the resulting image only contains the alpha
channel by the
> looks of things.
>
> Bests
> Norman Geis
>
> > -----Ursprüngliche Nachricht-----
> > Von: owner-namd-l_at_ks.uiuc.edu [mailto:owner-namd-l_at_ks.uiuc.edu] Im
> > Auftrag von John Stone
> > Gesendet: Mittwoch, 18. September 2019 17:19
> > An: jiali wang
> > Cc: namd-l_at_ks.uiuc.edu
> > Betreff: Re: vmd-l: Re: namd-l: Is there someway to render protein
picture
> > without background color?
> >
> > Hi,
> >   As I mentioned, this is a feature in the new test versions of
VMD 1.9.4,
> > so you'll need to download the new version to get both the support
for
> > alpha channel (transparency) and PNG image file format, both of
which
> > are required for this feature.  Try one of the VMD 1.9.4 test
builds and
> > let us know if you need further help.
> >
> > Best,
> >   John Stone
> >   vmd_at_ks.uiuc.edu
> >
> >
> > On Wed, Sep 18, 2019 at 11:14:28AM -0400, jiali wang wrote:
> > >    Dear John,
> > >    Thank you so much for your reply. I am using ubuntu
system with VMD
> > >    1.93.  I am trying to use TCL console to type the
command you
> provided.
> > >    it's says:
> > >    Info) Rendering current scene to 'alphachannel.png' ...
> > >    ERROR) Unrecognized image file extension, writing Targa
file.
> > >    OptiXDisplayDevice) Total rendering time: 0.19 sec
> > >    Info) Rendering complete.
> > >    But, I found I can not open the output file. after I
change the file
> type
> > >    to TAG, I could open that, but it  shows no
transparent background
> > >    effect?
> > >    Do you know what happened??
> > >    thank you so much for your help!
> > >    best regards,
> > >    JIali
> >
> > --
> > NIH Center for Macromolecular Modeling and Bioinformatics
> > Beckman Institute for Advanced Science and Technology
> > University of Illinois, 405 N. Mathews Ave, Urbana, IL 61801
> > http://www.ks.uiuc.edu/~johns/           Phone:
217-244-3349
> > http://www.ks.uiuc.edu/Research/vmd/
>
> 

-- 
NIH Center for Macromolecular Modeling and Bioinformatics
Beckman Institute for Advanced Science and Technology
University of Illinois, 405 N. Mathews Ave, Urbana, IL 61801
http://www.ks.uiuc.edu/~johns/           Phone: 217-244-3349
http://www.ks.uiuc.edu/Research/vmd/