50hz FixedUpdate looks like reprojection

I am moving my character around using physics calls, and by default this means a rate of 50hz. This causes very noticable jerking movement when viewed in my vive at 90hz.

To work around this i've set my physics update rate to 0.011111 which is almost 1/90 but not quite. This means there's a frame wrong now and then. Is this possible to avoid? I would like my physics to run at the exact rate as rendering does.

 

Best you can do is to disable Physics.autoSimulation, and run it manually in Update(). That way 1 update step is guaranteed to be 1 physics step. It has downsides if your framerate is not rock solid - but for VR I think it's the way to go

 

Ahh, that sounds like what I want alright, thanks for the heads up. So far I'm holding 90fps so this will be great!

 

30fps (1/30) is a good rate for VR physics.
90fps (1/90) is a good rate for actual interactions in progress - but don't use physics for this).

You should consider animated physics for directly interacted objects at frame (90fps) held, or attached to view) and 30fps for the physics that will be simulated in the world.

If you experience jerking or the temporal artefacts you describe, it is likely you did not turn on interpolation for the rigidbody affected.