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Outerra Tech Demo download. Help with graphics driver issues

Author Topic: Quad-buffered stereoscopic support for Nvidia cards  (Read 1430 times)

2eyed

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Quad-buffered stereoscopic support for Nvidia cards
« on: August 28, 2013, 03:40:12 pm »

With the latest driver releases Nvidia (re)enabled stereoscopic quad buffer support on non quadro cards.
Maybe you could look into this, since the stereoscopic experience with 3dvision is still much better than with Oculus Rift.
Current modes in Outerra  only offer half res, which is (even downsampled from 2880x1620 -slow!) not as crisp as it could be.
Also, there must be something wrong with the side-by side/half mode, as my display Asus VG27H shows no two matching views.
Top-bottom works well.
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cameni

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Re: Quad-buffered stereoscopic support for Nvidia cards
« Reply #1 on: August 28, 2013, 04:46:55 pm »

They did? Interesting.

Hmm, currently we are rendering stereo in a way optimized for half-buffers, with planes switched in between the individual rendering calls (to increase the cache coherency) and using scissor to cull the other part. As the result the performance is higher than it would be when rendering two buffers separately, but I think that for double buffers this style of switching will be actually more costly than two separate runs. In any case, support for this will require a more intrusive change & will be slower than if it was a single buffer.
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