Canvas Ui tracking AR object lag

Unity Engine
1

Here’s a video with my issue - watch those yellow/blue numbered canvas circles wobble around trying to catch up with the AR painting.

https://drive.google.com/file/d/1QjaG5w0F_wzo8EsA17T_XF_AtcRrRcKR/view?usp=sharing

I’m reading my 3d objects positioning and coverting them like this - where pso is an AR object and the debugCanvas is the UI canvas with the UI stuff.

float sx = debugCanvas.GetComponent().rect.width * cam.WorldToViewportPoint(pso.transform.position).x;
float sy = debugCanvas.GetComponent().rect.height * cam.WorldToViewportPoint(pso.transform.position).y;

i then set my ui canvas objects like this - this canvas object is anchored bottom left so it matches the viewport points which track from bottom left, across and up.
myRt.anchoredPosition = new Vector2(sx,sy);

now this works ok - everything is in the correct position, BUT it has some lag, so if I wave the camera around, the ui objects take a second to catch up with the AR object.

Not sure if this is something fixable or not, but any pointers would be appreciated

2

I might try experimenting with different “Update Types” on the Tracked Pose Driver component. Especially on Android I heard changing this setting might reduce jitteriness as the native camera refresh rate and Unity will be more closely synced.