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Up and Coming
July 14, 2013

Motion prediction settings ? -updated : tearing...-

Hello everyone,

I noticed something :
Launch your udk based demo (or UDK project)
Find some vertical edge they will be what you'll be looking at.
Then pan as slowly as possible your head (look from left to right, or right to left) and stay vertical doing so

Do you see it ? the panning jumps. it's skips, it's like little jumps. It's annoying...

Is that because of motion prediction settings ?
(you'll find them in .../Config/UDKEngine.ini
[Engine.Oculus]
bEnableHud=True
bDisableControllerPitch=True
bHideGun=True
bDisableDeathAnims=True
EyePosInHead=(X=12.600000,Y=0.000000,Z=7.000000)
bDisableMomentum=True
bUseDotCrosshair=True
CrosshairAlpha=64
CrosshairSize=6
CrosshairMinDistance=180
YawMult=1.000000
AccelGain=0.050000
MotionPrediction=0.020
MotionPredictionMode=2
bDisableWalkBob=False
bUpdateOnRT=True
MouseAimLimit=5461
MouseAimPitchLimit=3641
MouseAimMode=OMA_Normal

I don't have that same issue in OculusSmallTiny, OculusWorldDemo, or any Unity demo.

I saw the motion prediction settings and haven't tinkered with them, I don't dare ^_^

UPDATE : it was tearing... tearing at 1280x800 on a GTX 690... on very simple (all of them) UDK scenes... weird... I don't get it... v Sync in now ON.
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    5 replies

    Inspiring
    July 15, 2013
    Strange, I am not seeing that here. I just tested with a UT3 map, seems fine.
    AMD Ryzen 7 1800X | MSI X370 Titanium | G.Skill 16GB DDR4 3200 | EVGA SuperNOVA 1000 | Corsair Hydro H110i Gigabyte RX Vega 64 x2 | Samsung 960 Evo M.2 500GB | Seagate FireCuda SSHD 2TB | Phanteks ENTHOO EVOLV
    OlivierJTAuthor
    Up and Coming
    July 15, 2013
    I overstated the "as slow as possible", not that slow, so let's say 45 degres in around 3 seconds.
    It jumps, jumps, jumps... I wish I could capture it and show it...

    Could it be related to the fact that when i launch UDK"play this game on PC", the HMD says 1280x1024 60hz ??
    (same if I choose 1920x1200 or 1280x800 in the launch options can't get it to be at 1280x800...)
    Welcome to http://www.SynthesisUniverse.com it's out there, on the Oculus Share : https://share.oculus.com/app/synthesis-universe--maze--intro-experience
    Up and Coming
    July 17, 2013
    Is it screen tearing because VSync is off? Or just the frame rate hitching?
    GunLock - Multiplayer FPS UE4 Rollercoaster HydraDeck - RTS
    OlivierJTAuthor
    Up and Coming
    July 17, 2013
    Tearing at 1280x800... ??
    You got me in doubt so i enable VSync and...

    it's fixed...
    Turned on V Sync ON in Nvidia C Panel...

    How could i have tearing at this low resolution using a GTX 690 !???
    This is nuts ^_^
    Welcome to http://www.SynthesisUniverse.com it's out there, on the Oculus Share : https://share.oculus.com/app/synthesis-universe--maze--intro-experience
    Up and Coming
    July 25, 2013
    "OlivierJT" wrote:
    Tearing at 1280x800... ??
    You got me in doubt so i enable VSync and...

    it's fixed...
    Turned on V Sync ON in Nvidia C Panel...

    How could i have tearing at this low resolution using a GTX 690 !???
    This is nuts ^_^


    Good finding, Iv been having tearing even in unity demos