Graphics Card for VR

[Anonymous]

Hi, we're working on a project using VRED with HTC Vive. We are currently using a GTX 1080, and are experiencing some problems with the visualization of the file. It's really slow and the experience is not good yet.

My question is:

what is the minimum system requirements that you suggest to have a good experience?

Should I get 2 1080 SLI?

Or it would be better to use a Titan X (or two) instead of the 1080?

Or to achieve the quality we're expecting will be necessary go to the Quadro 5000 or 6000?

Thanks a lot.

[michael_nikelsky]

Hi,

the GTX1080 (not the founders edition because those thermal throttle, any GTX1080 with a custom cooler should be fine though) should be pretty much you best option with the only step up being the new Titan X (the new pascal based one - not sure what nvidia was thinking naming this card exactly like its predecessor). SLI will improve performance in VR quite a lot so it is definetely worth it.

However, your performance is always determined by your scene so for VR you have to be carefull what you use. Some shaders and options can be quite expensive, for example the woven cloth material, orange peel or the useStructure option are quite costly. Also the number of objects and number of triangles are limited in VR.

Kind regards

Michael

[Anonymous]

Thanks Michael!

We're working on the file to make it "lighter" with less triangles and so. Is there a "maximum number" of triangles in the file to perform well?

We're almost getting there on the exterior, but the interior has been a challenge. We're reducing the number of objects, but in the interior, we have a big range of objects with different textures, so we couldn't merge more objects and achieve a realistic look yet.

Do you recommend a specific setup to use (or not) with HTC Vive? For example, should we use "Realtime Antialiasing"? When we activate it, the quality improves, but the visualization on the HTC Vive get really slow... What about the option "Postprocess Antialiasing"?

Or maybe overwrite the graphics card settings?

Once again, thanks a lot!

[seiferp]

Also, as shorter your scene tree is as faster VRED can render. So it might make sense to combine things if your data process allowes it.

[michael_nikelsky]

Giving a triangle limit is quite difficult since it depends on a lot of things. Usually for an SLI setup 20 million triangles should be ok, maybe more. You might want to avoid very large objects if possible since those can´t be culled efficiently and cause a lot of overdraw.

Starting with VRED 2017 SP1 (the command was broken in the original 2017 release, so you need the current SP1 for it) you can force the Vive to run with 45fps and warping every other fram by calling

setOpenVRHMDForceInterleavedReprojection(true)

This works quite well in most situations although I must say the oculus rift does a much better job here since it does the reprojection automatically whenever needed.

Kind regards

Michael

[mnosbues]

Michael,

does VRED already take advantage of the new VR specific enhancements of the PASCAL architecture like 'Single Pass Stereo' (see here )? And if not, in which version is this expected?

Regards,

Martin 

[Anonymous]

Has anyone had a chance to compare the GTX 1080 (pascal) vs the Titan X (pascal) ?

[cmiddlin]

Definately realtime anti aliasing , headset wont allow post processing , I would recommend no higher than medium setting .. also add a medium quality ambient occlusion, people dont realise than when you run high ambient occlusion it adds complexity to your model ( a classic example of this look at the wireframe of the groundplane without any shadows , add the ground shadows on high then take another look at the wirefram )l and I usually turn on the ambient occlusion culling  helps performance on most models . I like to turn on real time shadows but this can also effect performance .

[michael_nikelsky]

Just a sidenote: We have completely rewritten the realtime antialiasing for the 2017.2 Update so the old Medium Settings is not comparable to the new mode anymore. In some cases you will get a better quality at medium now compared what you previously got with ultra high at a much better performance. You can even customize the antialiasing levels in the preferences now if you want to fine tune.

Still, the new medium level, which is 4x Multisampling + pixel filtering, should be a good balance between quality and performance.

[tonykakkar2018]

One of my friend is having EVGA GeForce GTX 1070 FTW Gaming.  Basically, I have not got chance but I have seen found a list of best Graphics card for VR which you guys can check.