Jitter when objects are moving rapidly or attached to the camera

I'm seeing a significant amount of shake on objects that are either moving quickly through the scene or attached to the camera, such as targeting cursors.

I've tried everything I can think of to alleviate this issue, but it seems to be associated with the way that the Daydream Technical Preview renders in VR mode. Smoothing animation doesn't appear to help the issue much, it's almost like old frames are being duplicated.

Has anybody else seen this issue? Any solutions?

Many thanks.

 

Here's an example project which demonstrates the issue:

 

I have had similar Issues

 

Is there a tracking ticket on this bug?

 

Good news! This issue appears to be (pretty much) resolved in version 5.4.2f2-GVR13. There may still be very occasional glitches, but the issue is much less noticeable and much more acceptable.

Many thanks to Unity and Google!

EDIT: Perhaps not. Objects in the scene appear smoother, but there still appear to be issues with HUD elements or 'reticles'.

 

Still experiencing jitter. 1.10 has had no effect as far as I can tell.

I'd attach a Unity project, but it would be a camera with a cube attached to it, so I'll provide these steps instead:

Reproduction steps:

1) Start a new project in Unity 5.4.2f2 GVR-13 Personal.
2) Import gvr-unity-sdk 1.10 unitypackage.
3) Open GVRDemo.unity.
4) Create a Cube primitive as a child of the Player->Main Camera object.
5) Shrink the cube a bit, move it forward so it is in view of the Main Camera. Rotate it a bit to have some nice sharp constrasty corners.
6) Build for Daydream:
a) Set build target platform to Android.
b) Edit->Project Settings->Player->Other Settings: Enable VR, choose Daydream SDK.
c) Set Minimum API Level to Nougat.
d) Set the GVRDemo scene as the startup scene in build settings.
e) Plug in Pixel, build and run.
7) Look around in the scene. Observe cube jitter.

This jitter still happens when attempting to use different VSync and Application.targetFrameRate settings:

1) Vsync (On by default).
A) Try turning Vsync off in Quality Settings.
B) Try turning Vsync to double.
2) Application.targetFrameRate
A) Create a GameObject. Attach a script that calls Application.targetFrameRate = 60 on Start().
B) Try Application.targetFrameRate = 59. Still no dice.

Are there some magic settings I'm missing?

 

Ah, apologies, you're focusing on the object attached to the camera, whereas I was more focussed on the distant objects moving in the scene. Distant objects seems to be much smoother than before, but you're right, the 'reticle' still jitters quite a bit.

Perhaps the issue is not as resolved as I'd thought.

 

Unfortunately when I tried the same procedures on your example scene, I observe the oscillating object (not attached to the camera) to jitter in the same way as well. I hope the issue doesn't get marked as resolved on Daydream's end; I just haven't observed any improvement since GVR10.

 

Hi guys and @thep3000 , as of 5.6.0 beta 4 this issue persists, and I would say it seriously affects quality.

• more-or-less moving objects appear jittery/sputtering, as if frames are dropped or something impedes their movement
• this problem is very easy to reproduce, just create an emtpy scene, add a standard sphere at distance 10 from the player and have it move around the player with something like:

Code (CSharp):

1. transform.RotateAround(Camera.main.transform.position, Vector3.up, 30 * Time.deltaTime);

• the problem persists whether Update or LateUpdate is used
• the problem is selective to Daydream (I'm using the Pixel XL). If I use the same simple project and build it for the Gear VR (with a Samsung S6), the object moves smoothly
• interesting (in a sad way): this problem also used to occur on Gear VR, I remember seeing it as late as summer 2015, but it disappeared some time later.

Please Unity, it would be great if you could treat this as a bug, as it really makes certain kinds of games (like ours) look bad.

 

@WendelinReich you should submit a bug report with that simple project attached; it will get far more traction more quickly that way.

 

Did that now, filed under case number 872723

 

Is this happening also in Unity 5.6.0b4?

 

That's what @WendelinReich said:

I'm just in the process of upgrading from the 5.4 Daydream preview to 5.6.0b4 so expect to see it shortly myself

 

I have been having the same issue. Quality severely affected, even if app runs at 60fps. Its been there in all the GVR releases, still see it in 5.6.0b4. Its the main barrier to release for me. Same scenes on Gear VR work smoothly.

I can't find issue 872723 under the bug tracker - can you provide a link?

 

Still happening in Unity 5.6.0b5

 

Absolutely: https://fogbugz.unity3d.com/default.asp?872723_t34vivnbb30cedeu

 

I had also made a issue of this on the Google GitHub page here: https://github.com/googlevr/gvr-unity-sdk/issues/397

 

Still happening in Unity 5.6.0b6

 

Still happening in Unity 5.6.0b7 + GVR Unity SDK v1.20.0.

 

Still happening in Unity 5.6.0b8. joejo, can you verify that your fix did not make it into b8? The ticket has been closed, but the bug is not fixed. https://fogbugz.unity3d.com/default.asp?872723_t34vivnbb30cedeu

Simple project that demonstrates the problem: https://drive.google.com/file/d/0B_w9_hQJupIYMXNsSTgtYzVSUUE/view

GIF
https://drive.google.com/file/d/0B_w9_hQJupIYdXVZaTFvYm92QUU/view?usp=sharing

 

Would you mind posting the link to that earlier bug just so I can observe the ticket? Thanks for the quick reply.

 

Looks like that link requires a login

 

Update: The bug is not fixed. The jitter occurs in the latest GVR SDK example scene with an object attached to the camera. The jitter occurs without the GVR SDK in a bare-bones scene with an object attached to the camera. The jitter occurs whether vsync is enabled or disabled.

Gif, recorded from a build made with Unity 5.6b9, in this case in the GVR SDK example scene:
https://drive.google.com/file/d/0B_w9_hQJupIYWmMwSk02UlhyVVE/view?usp=sharing
The same project I posted above regarding 5.6b8 also reproduces the issue when upgraded to 5.6b9.

It's concerning the bug is marked as closed because the bug is not fixed.

 

Any update on when the release of b10 is? waiting for this resolve before moving to the beta client.

 

Looks like right now!

 

There is absolutely no difference in jittering issue in 5.6.0b10 for me. Do I need to use some specific settings in player settings?

 

Seeing the same thing... I just moved my preview build to b10. I'm running a consistent 60fps and still seeing the judder.

 

Check out the release notes though, apparently the fix isn't in b10 after all...

 

dang... was going off what was said in the thread. Guess I'll keep on trucking till its patched.

 

I thought it was this:

• VR: Fixed an issue where vSync did not work with Cardboard/Daydream on Android. (871514)

 

You're right, that's the fix, though it's strange that it's not listed in the "delta b9-b10" section (as it's not in b9 or before).

Also, I can confirm that b10 fixes the jitter issue I had reported. Objects that move rapidly relative to the camera now appear to move smoothly, without frame drops. Great work!

 

Don't suppose you could just post project Player Settings, Quality settings and Graphic settings... guessing I have something setup wrong.

 

Did this issue cause vsync to now always be enabled on Daydream? I'm still seeing a signficant FPS drop when moving from GVR tech preview to 5.6 beta 10. On GVR preview 13, we're between 50 and 70 frames per second, but on 5.6 we drop all the way down to 35 - 45 fps. I'm wondering if maybe vsync is being forced on in 5.6.

 

AFAIK vsync should only drop the performance to 30 (from 60) if your game is unable to keep going at 60. So maybe the question is why you're not hitting a constant 60 on the GVR preview

 

@joejo
Still happening in Unity 5.6.0f2！When the head rotates, there will be jitter，did I have missed anything？

 

@joejo
Thank you for your reply!
Sorry,Unity 5.6.0f3 is perfect！It’s OK，v sync count = Every V Blank!