performance vr vs 2d

1st Official Post

    Hey guys,

    I've been enjoying Aerofly in VR a lot lately.

    There is one question that came up when I switched to my monitor:

    When playing on my 2560x1440 monitor I get fps that are constantly above 100 with everything maxed out in OrbX Innsbruck.

    Playing in VR on my Oculus Rift my system has a hard time keeping 45fps (no supersampling). I usually have to disable trees and shadows to get at least 45fps.

    To my understanding the resolution of the rift is lower (2160x1200) without supersampling than wqhd. Thus I would have expected to see similar frame rates in vr and on my monitor.

    Are there any other differences between rendering in vr an 2d that I am not aware off or is it more likely a configuration error on my side?

    My System:
    GPU: GTI 970

    CPU: i5 4690k

    RAM: 8GB DDR3 1600

    Beste regards

    Peter

    • Official Post

    There is one major difference here. When running in VR mode the screen needs to render twice as opposed to once for a single monitor.

    IPACS Development Team Member

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    Jeff

    Peter, first make sure in VR SETTINGS you have "SHOW NATIVE VIEW ON MAIN MONITOR" = NO as YES will cost you performance.

    Next, try these custom GRAPHICS SETTINGS - U, H, H, M, L, L - I get a very smooth 90 FPS around NYC using a GTX1080+Odyssey combo with supersampling @ 1.33 so your 970+Rift combo should be fairly smooth with these settings.

    I think you also want LIMIT FRAME RATE (in Graphics Settings) = OFF.

    See if any of this helps and report back.

    Quote from kenventions

    Peter, first make sure in VR SETTINGS you have "SHOW NATIVE VIEW ON MAIN MONITOR" = NO as YES will cost you performance.

    Next, try these custom GRAPHICS SETTINGS - U, H, H, M, L, L - I get a very smooth 90 FPS around NYC using a GTX1080+Odyssey combo with supersampling @ 1.33 so your 970+Rift combo should be fairly smooth with these settings.

    I think you also want LIMIT FRAME RATE (in Graphics Settings) = OFF.

    See if any of this helps and report back.

    One thing to remember is that the NYC scenery is a miracle of optimization, Innsbruck is a bit harder to get perfect smoothness with, and Chicago is hardest of all.

    Quote from drhotwing1

    There is one major difference here. When running in VR mode the screen needs to render twice as opposed to once for a single monitor.

    I could be wrong on this but I think it gets rendered more than that as the spherical aberration has also to be put in to balance the distortion from the lenses. I find in most games the step from 2D to VR reduces framerate to about a third of what you start with. It's an indication of how efficient the graphics engine in AFS2 is that we get such good framerates in VR.

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