Een tijdje terug heb ik een mailtje verstuurd naar videokaartfabrikanten, maar ze hebben grote moeite te begrijpen wat ik bedoel. Hieronder zet ik een stukje van de conversatie met 3dfx neer. Het is de bedoeling dat jullie razend enthousiast worden en spontaan bij deze fabrikanten aan de bel gaan trekken voor een softwareupdate! 
Ok hier begint het einde van het mailtje:
----------------------------------------
I would like to add a third possibility, namely dividing your monitor into
two seperate OpenGL views.
This way you can use polariod filters while not having to use two monitors
or cards.
On the other side using two cards and two monitors has a big preference for
the quality of the picture, otherwise the card would have to use it's
resources for two OpenGL views at once (and I do not know if 3dfx cards are
capable of that at all).
Sander Timmermans
----- Original Message -----
From: Sander Timmermans <briefjes@casema.net>
To: Eric Moore <EMoore@3dfx.com>
Sent: Tuesday, November 21, 2000 9:38 PM
Subject: Re: dualhead OpenGL
> Yes indeed.
> This would mean a cheap alternative to create true 3d reality. This can be
> done in two ways:
>
> 1) Buy some polarisation filter at your local photoshop. This is the same
> filter used in LCD watches, gameboy etc. Take 2 samples of the sheets,
they
> appear transparent for every color, but as you rotate them over each other
> they will block all the light trying to pass trough it. This means you can
> make the light from one monitor travel into one eye and the light from the
> other monitor in the other eye (By holding the filter for one eye
horizontal
> and vertical on the other eye. The same applies for the monitors or
> beamers).
>
> 2) Buy a head up display that has an RGB input for each eye, like the ones
> at www.keo.com
>
> You can see this has a clear advantage above shutter glasses. Shutter
> glasses not only divide the refreshrate in half, they also make the
refresh
> stand out more because they have to wait for the monitor to switch between
2
> images. As in all analog equipment, it takes some time to get from one
state
> to the other. For the glasses to work with all monitors manufacturers
build
> in a safety time between 'shuts' to avoid seeing the fade out effects of
the
> old image. This means that even at a safe 200hz monitor you still 'see'
the
> interval between the shuts and/or you get very disorientated by the
effects.
>
> So shutter technology does not have the future in my opinion.
> It seems to me you do not have to extend the OpenGL API, but create some
> sort of layer that knows you want to use two OpenGL views (in this case
> using two cards) at the same time.
>
> Sander Timmermans
>
> ----- Original Message -----
> From: Eric Moore <EMoore@3dfx.com>
> To: 'Sander Timmermans' <briefjes@casema.net>
> Sent: Tuesday, November 21, 2000 11:01 AM
> Subject: RE: dualhead OpenGL
>
> > Thank you for contacting 3dfx!
> >
> > So are you trying to say you want to run a Multiple-Monitor setup? Two
> video
> > cards? Each running one monitor?
> >
> > Thanks,
> >
> > Eric
> > 3dfx Technical Support
> > (Please keep all correspondence attached)
> >
> > You wrote:
> > -----Original Message-----
> > From: Sander Timmermans [mailto:briefjes@casema.net]
> > Sent: Tuesday, November 21, 2000 9:58 PM
> > To: Eric Moore
> > Subject: Re: dualhead OpenGL
> >
> > That was not my question.
> > My question is: will you make a software update so you can use two
cards,
> > each for one eye!
> > No need to make new cards! Just add some lines in the software.
> >
> > Sander
> >
> > ----- Original Message -----
> > From: Eric Moore <EMoore@3dfx.com>
> > To: 'Sander Timmermans' <briefjes@casema.net>
> > Sent: Tuesday, November 21, 2000 10:53 AM
> > Subject: RE: dualhead OpenGL
> >
> > > Thank you for contacting 3dfx!
> > >
> > > There is no such thing as Dualhead OpenGL. OpenGL is a graphics API.
> > >
> > > Dualhead is a term that would refer to a video card that can drive two
> > > montiors.
> > >
> > > We do no make such a card.
> > >
> > > Thanks,
> > >
> > > Eric
> > > 3dfx Technical Support
> > > (Please keep all correspondence attached)
> > >
> > > You wrote:
> > > -----Original Message-----
> > > From: Sander Timmermans [mailto:briefjes@casema.net]
> > > Sent: Friday, November 17, 2000 11:54 PM
> > > To: Email Support
> > > Subject: dualhead OpenGL
> > >
> > > Hi,
> > >
> > > Sorry for the improper addressing of this mail.
> > > I have a question.
> > > Will it be made possible in the future for using two 3d accellerator
> cards
> > > for dualhead OpenGL so I could connect it to any LCD headset?
> > > This would mean running the same 3D simulation over 2 different cards
> with
> > > one card having a slight offset in order to reproduce real 3D.
> > >
> > > It would sure mean another sale opportunity for you considering you
can
> > sell
> > > 2 cards instead of one :-)
> > >
> > > Sander Timmermans
Ok hier begint het einde van het mailtje:
----------------------------------------
I would like to add a third possibility, namely dividing your monitor into
two seperate OpenGL views.
This way you can use polariod filters while not having to use two monitors
or cards.
On the other side using two cards and two monitors has a big preference for
the quality of the picture, otherwise the card would have to use it's
resources for two OpenGL views at once (and I do not know if 3dfx cards are
capable of that at all).
Sander Timmermans
----- Original Message -----
From: Sander Timmermans <briefjes@casema.net>
To: Eric Moore <EMoore@3dfx.com>
Sent: Tuesday, November 21, 2000 9:38 PM
Subject: Re: dualhead OpenGL
> Yes indeed.
> This would mean a cheap alternative to create true 3d reality. This can be
> done in two ways:
>
> 1) Buy some polarisation filter at your local photoshop. This is the same
> filter used in LCD watches, gameboy etc. Take 2 samples of the sheets,
they
> appear transparent for every color, but as you rotate them over each other
> they will block all the light trying to pass trough it. This means you can
> make the light from one monitor travel into one eye and the light from the
> other monitor in the other eye (By holding the filter for one eye
horizontal
> and vertical on the other eye. The same applies for the monitors or
> beamers).
>
> 2) Buy a head up display that has an RGB input for each eye, like the ones
> at www.keo.com
>
> You can see this has a clear advantage above shutter glasses. Shutter
> glasses not only divide the refreshrate in half, they also make the
refresh
> stand out more because they have to wait for the monitor to switch between
2
> images. As in all analog equipment, it takes some time to get from one
state
> to the other. For the glasses to work with all monitors manufacturers
build
> in a safety time between 'shuts' to avoid seeing the fade out effects of
the
> old image. This means that even at a safe 200hz monitor you still 'see'
the
> interval between the shuts and/or you get very disorientated by the
effects.
>
> So shutter technology does not have the future in my opinion.
> It seems to me you do not have to extend the OpenGL API, but create some
> sort of layer that knows you want to use two OpenGL views (in this case
> using two cards) at the same time.
>
> Sander Timmermans
>
> ----- Original Message -----
> From: Eric Moore <EMoore@3dfx.com>
> To: 'Sander Timmermans' <briefjes@casema.net>
> Sent: Tuesday, November 21, 2000 11:01 AM
> Subject: RE: dualhead OpenGL
>
> > Thank you for contacting 3dfx!
> >
> > So are you trying to say you want to run a Multiple-Monitor setup? Two
> video
> > cards? Each running one monitor?
> >
> > Thanks,
> >
> > Eric
> > 3dfx Technical Support
> > (Please keep all correspondence attached)
> >
> > You wrote:
> > -----Original Message-----
> > From: Sander Timmermans [mailto:briefjes@casema.net]
> > Sent: Tuesday, November 21, 2000 9:58 PM
> > To: Eric Moore
> > Subject: Re: dualhead OpenGL
> >
> > That was not my question.
> > My question is: will you make a software update so you can use two
cards,
> > each for one eye!
> > No need to make new cards! Just add some lines in the software.
> >
> > Sander
> >
> > ----- Original Message -----
> > From: Eric Moore <EMoore@3dfx.com>
> > To: 'Sander Timmermans' <briefjes@casema.net>
> > Sent: Tuesday, November 21, 2000 10:53 AM
> > Subject: RE: dualhead OpenGL
> >
> > > Thank you for contacting 3dfx!
> > >
> > > There is no such thing as Dualhead OpenGL. OpenGL is a graphics API.
> > >
> > > Dualhead is a term that would refer to a video card that can drive two
> > > montiors.
> > >
> > > We do no make such a card.
> > >
> > > Thanks,
> > >
> > > Eric
> > > 3dfx Technical Support
> > > (Please keep all correspondence attached)
> > >
> > > You wrote:
> > > -----Original Message-----
> > > From: Sander Timmermans [mailto:briefjes@casema.net]
> > > Sent: Friday, November 17, 2000 11:54 PM
> > > To: Email Support
> > > Subject: dualhead OpenGL
> > >
> > > Hi,
> > >
> > > Sorry for the improper addressing of this mail.
> > > I have a question.
> > > Will it be made possible in the future for using two 3d accellerator
> cards
> > > for dualhead OpenGL so I could connect it to any LCD headset?
> > > This would mean running the same 3D simulation over 2 different cards
> with
> > > one card having a slight offset in order to reproduce real 3D.
> > >
> > > It would sure mean another sale opportunity for you considering you
can
> > sell
> > > 2 cards instead of one :-)
> > >
> > > Sander Timmermans