From: Yoav Atsmon-Raz (yoav.atsmonraz_at_ucalgary.ca)
Date: Thu Apr 07 2016 - 15:34:34 CDT

Hi John, i actually changed the scanning option of the TV to "just scan" from its factory setting and the row interleaved option started to work although the axises' are not being rendered correctly. Is it suppose to be this way? Is there anyway to fix this? Generally we still have some anomalies at the sides of the screen although whenever something appears primarily in the center, it seems just fine.

Thanks in advance, Yoav
________________________________________
From: owner-vmd-l_at_ks.uiuc.edu [owner-vmd-l_at_ks.uiuc.edu] on behalf of Norman Geist [norman.geist_at_uni-greifswald.de]
Sent: Wednesday, April 06, 2016 11:30 PM
To: 'John Stone'
Cc: VMD Mailing List
Subject: AW: vmd-l: setting up a 4k HD TV for passive stereoscopic 3d

I agree with John,

we do also use passive 3D displays with VMD and it works as easy as:

1. Set the display resolution to the TVs native resolution, otherwise row
interleaved stereo won't ever work. (think about it)
2. Leave the 3D options of the TV totally untouched, do not even activate
it. Everything is already in place on the screen of your TV having row
interleaved polarization filters.
3. Set VMD to row interleaved and potentially swap eyes. (Remember moving
the VMD graphics window only one pixel in Y direction will cause the eyes to
swap again, so you may want to adjust the eyes to fullscreen)

Good luck

Norman Geist

> -----Ursprüngliche Nachricht-----
> Von: owner-vmd-l_at_ks.uiuc.edu [mailto:owner-vmd-l_at_ks.uiuc.edu] Im Auftrag
> von John Stone
> Gesendet: Donnerstag, 7. April 2016 02:19
> An: Yoav Atsmon-Raz <yoav.atsmonraz_at_ucalgary.ca>
> Cc: vmd-l_at_ks.uiuc.edu
> Betreff: Re: vmd-l: setting up a 4k HD TV for passive stereoscopic 3d
>
> Hi,
> It seems from the list below that you did not yet try setting VMD to
> row-interleaved stereo while the TV is set to the normal display mode,
> i.e. leaing the TV in a non-3D display mode and having VMD do all of the
> stereo processing. I would recommend trying that combination rather than
the
> approach of things you tried up to this point. You will also want to make
> sure that your GPUs are driving the TV in a so-called 4:4:4 color mode
> where there is no chrominance downsampling, as that would interfere with
> correct stereoscopic display. On the LG TVs you may also want to set the
> TV to "video game" mode, so that it disables any post-processing
> motion compensation filters that can smear out the row-interleaved
> stereo that VMD generates.
>
> Cheers,
> John Stone
> vmd_at_ks.uiuc.edu
>
> On Wed, Apr 06, 2016 at 07:49:10PM +0000, Yoav Atsmon-Raz wrote:
> > Hi John,
> >
> > Strangely part of my message was cut out from the original message so
i'll post
> it now instead:
> > ---------------------------------
> > Our setup is as follows:
> >
> > GPUs: 2 X Nvidia Gefroce 980 Ti using the Nvidia 352.63 driver
> > OS: Ubuntu 14.04
> > The CPU/RAM is a X99 Workstation with a Xeon octocore and 32 GB of ram.
> >
> > Things we tried so far:
> > 1) Swapping out HDMI cables;
> > 2) removing SLI bridge
> > 3) switching from Unity to XFCE4
> > 4) reinstalling nvidia drivers
> > 5) testing the 3d TV on its own 3d self test that worked great.
> > 6) Trying to visualize the same molecule with Chimera (same problem).
> >
> > We're really at a loss for ideas here and are willing to try anything,
so if anyone
> has a suggestion based on their own experience with passive 3d tvs, i'll
be more
> then happy to hear about it.
> >
> > Thanks in advance, Yoav
> > ---------------
> >
> >
> > ________________________________________
> > From: John Stone [johns_at_ks.uiuc.edu]
> > Sent: Wednesday, April 06, 2016 1:31 PM
> > To: Yoav Atsmon-Raz
> > Cc: vmd-l_at_ks.uiuc.edu
> > Subject: Re: vmd-l: setting up a 4k HD TV for passive stereoscopic 3d
> >
> > Hi,
> > We will need more information to be able to help you out.
> > In general, you have two major approaches for using passive
> > stereo on a TV. One way is to depend on the GPU and its graphics
> > driver to supply quad-buffered stereo, and drive the TV using
> > an HDMI stereo 3-D signal and video mode. In that mode, you would
> > tell VMD to use quad-buffered stereo in the Display | Stereo menu,
> > and you might need to set the TV mode to enable 3-D display.
> >
> > The other way of getting stereo is to run the TV in a normal
> > (non-stereo) display mode, and leave the GPU driver set with
> > quad-buffered stereo off/disabled. In that mode, VMD would
> > generate the stereo signal itself using row-interleaved
> > OpenGL rasterization in software, and you will need to ensure
> > the correct left/right eye mapping by turning on/off the stereo
> > eye swap feature in the Display | Stereo menu if you move
> > the OpenGL window around on the screen.
> >
> > If you can tell us more specifically exactly what steps you've
> > taken we can give further guidance.
> >
> > Cheers,
> > John Stone
> > vmd_at_ks.uiuc.edu
> >
> >
> > On Wed, Apr 06, 2016 at 06:45:49PM +0000, Yoav Atsmon-Raz wrote:
> > > Greetings everyone, recently our research group has purchased an LG
> UF8500 4k HDTV that has passive spectroscopic 3d integrated into it and we
are
> interested in using it to display proteins with VMD. We have used the
stereo>rows
> option and while we do get a 3d image the protein appears as horizontal
stacks
> that push out of the screen instead of a spheroid shape which we should be
> getting. We also tried every of the other options in the stereo menu, but
neither
> one of them is giving us the right shape in terms of depth
> > --
> > 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/