How to reduce aliasing/flicker in the Desktop Viewer?

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  • #206921
    grumbel45
    Participant

    When using the Desktop Viewer I get a lot of aliasing, which isn’t unexpected as the resolution of the desktop is much higher than what my headset can display, and there doesn’t seem to be any filtering or mipmapping going on to properly downsample the image.

    If similar issue pop up in other VR applications, e.g. watching a 4k movie in SkyboxVR, it’s possible to fix it by cranking up the SteamVR resolution really high, as SteamVR itself seems to do proper downsampling. However SteamVR resolution doesn’t have any effect on the VorpX desktop viewer.

    Any other things I could try to reduce the aliasing/flicker in the Desktop Viewer?

    #206925
    Ralf
    Keymaster

    The desktop viewer image isn’t mipmapped on purpose since that would make it more blurry, but changing the Clarity setting on the image page of the vorpX menu from low to medium will raise the final headset resolution as well as enable high quality Lanczos instead of bilinear sampling. That should do the trick.

    #206929
    grumbel45
    Participant

    No luck. The Clarity setting doesn’t help, no matter if Low/Medium/High/Off or how the sharpness is set, the image always ends up with far more shimmering than I’d like.

    In comparison I can get a much more stable image with BigScreen, it’s not quite perfect there either, especially with smaller virtual screen sizes, but at least it looks usable. Only way I get a stable image out of Vorpx Desktop Viewer is by reducing the desktop resolution down to 800×600, but that is a bit too low to be usable.

    My setup here is a bit unusual however, AMD Relive WLAN streaming over to a Lenovo Mirage Solo. And the games I try to play are 2D point&click adventures or Visual Novels and the shimmering really stands out with those 2D games and the text.

    #221409
    333hronos
    Participant

    I have encountered the same issue.
    It looks like a lack of image filtering.

    My monitor resolution is 4K.

    I’m glad it’s not very noticeable in dynamic games, but it is in static scenes, or on the desktop: with fonts, small details.

    For example, Virtual Desktop’s in-app desktop streaming doesn’t have this issue – no matter what resolution I use – image is clear and not shimmering, like on normal monitor.

    #221414
    Boblekobold
    Participant

    You can :
    – Activate Clarity FX, use sharpness filter (and texture enhancement if available) in VorpX’s ingame menu page 2. It improves image quality a lot, at least in mono (I don’t know if it works with SBS mode, but it works very well when you hook a game).
    – Use VorpX V24’s Virtual Monitor and choose an higher resolution than 4k.

    #221417
    Cless_Aurion
    Participant

    This is still an issue in V24.
    Its now inverted for me, and it is far from usable. It looks about what I could expect a 1440p HMD (like the Vive Pro/Index) to look as.

    It literally is pushing me away from using VorpX AT ALL, since this seems a limitation on VorpX itself not being able to render at higher resolutions (not a filtering issue at all, my HMD pixels are way smaller than the chonky pixels its trying to render)

    My HMD moves around 50% more pixels PER EYE than my 4K monitor (8 million pixels on a 4K monitor VS 12 million pixels per eye on my HMD).


    @Boblekobold

    8640×4860 (the highest resolution V24’s allows me to set) looks as bad as 1440p does. Resolutions under that will look worse, but no resolution over that looks better. The center of the vision of my HMD tops at around 5500p, which should match a 4K monitor of 32 inches PPD wise, so again, not a filtering issue, and the fact that 4860p looks identical to 2160p is worrying.

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