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Old 06-26-2014, 09:32 AM
performlabrit performlabrit is offline
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Join Date: Oct 2013
Posts: 77
No 3D link with a Benq?

Hi guys, I'm trying to get my BenQ to display in 3d using 3D link, and i'm not having any luck.

The projector supports 60Hz Top-Bottom 3D for resolutions up to SXGA+.
http://www.benq.us/product/projector/MW870UST

Enabling viz.STEREO_3DTV_TOP_AND_BOTTOM produced two vertical stacked images. My assumption is that this means the projector is not correctly parsing the images according to the DLP-Link format, despite the fact that the project has "3D Sync" enabled.

There is very little info out there on the topic, so any help is appreciated.

To anticipate: I can't use NVidia Vision. Although I'm using a compatible NViDA GTX 690, the projector lacks the necessary dual link DVI-I in.
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Old 07-02-2014, 05:44 PM
Jeff Jeff is offline
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If you've set the correct stereo output in Vizard, then you might check with the projector manufacturer's support to verify the stereo inputs it accepts and how to configure that.
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Old 07-07-2014, 11:06 AM
performlabrit performlabrit is offline
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Problem solved, thanks to the persistence of a wily grad student and a lengthy back and forth with Jeff. Thanks again, Jeff! You're always a huge help.

To those having similar issues:

It turns out that our projector's listed specs were inaccurate, and it did not accept a listed 3D format. This is BenQ's fault. So, we abandoned the use of DLPLink on our Geforce card, and instead got things to work using a Quadro card using the Quad_Buffer option.

Just FYI, to enable quad buffering, we had to go into nVidia control panel and enable stereo mode for "winviz.exe" and not "Vizard.exe".

****
Info. summary in case anybody runs into the same trouble:

1. BenQ MW870UST 3D DLP link projector.
**Set at a resolution supporting 120Hz.**

2. Generic active shutter glasses.

3. nVidia Quadro 4000

4. Vizard 5 32 bit
i. Run and close application once to register with "nVidia Control Panel" automatically.
ii. If "winviz.exe" does not automatically populate itself on "nVidia Control Panel -> Manage 3D settings",
click on add and navigate to Vizard's installation directory and select "winviz.exe".
iii. Enable stereo mode for "winviz.exe".

5. Run code with the "viz.QUAD_BUFFER" flag.
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