steamvr_unity_plugin Errors using URP, Unity 2020.3 LTS and Multipass

Using a clean project with the latest version of Unity 2020.3.2 LTS, SteamVR 2.7.3 and the URP template makes the editor throw errors on play if Multi-pass is used: (In the SteamVr sample scene for example)

Assertion failed on expression: 'IsMatrixValid(matrix)' UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr, Boolean&)

I can reproduce the issue on two computers.

Apr 08 '21 21:04 FaBoris

We'll take a look at this. Thanks for the report.

Apr 08 '21 21:04 keithbradner

Hi, I can also reproduce this issue on 2020.3.0 and 2020.3.3 (using clean project) Works fine using 2019.4.

Apr 12 '21 22:04 FaBoris

Hi again, Did you manage to reproduce the issue on your end ? Thanks.

Apr 17 '21 23:04 FaBoris

Sorry, URP is only somewhat supported as it continues to change. Are you seeing this error in the Simple Scene?

Apr 27 '21 21:04 keithbradner

Hi, yes this error happend in the SteamVR sample scene. I have tried with every version of Unity 2020.3.X

Apr 27 '21 22:04 FaBoris

Hi - Just a quick note to let you know we're working with Unity to investigate this issue.

Thanks, Rune

May 03 '21 17:05 1runeberg

Hi again, sorry for insisting but can you confirm the issue on your side? I am worried since I don't see anyone else having it and I don't see it reported on the "know issues" section coming with each unity 2020.3.X LTS update. Thanks in advance.

Jun 10 '21 03:06 FaBoris

Am also currently experiencing this issue using the exact same setup as OP, any updates?

Jun 18 '21 01:06 CircuitLord

Am also currently experiencing this issue using the exact same setup as OP, any updates?

Aug 25 '21 03:08 KazukiKuriyama

Hey any update about this issue? Thanks.

Oct 17 '21 02:10 Neuforteil

Hello. I've been replicated this error also with Unity 2021.1.5 and 2021.3.2, URP template scene and multipass cause the editor to throw many errors per-frame. This issue also affects all my others URP multipass projects.

The real problem is that these exceptions also cause a very heavy performance loss and makes a multipass project impossible to run smoothly with steamVR. Is there any update?

Thanks, will attach the errors i'm getting. err

May 23 '22 09:05 ExperentiRD

Getting the same issue as ExperentiRD in Unity 2021.3.4f1, URP, multi pass. Also performance lags and only renders on left eye for lights, VFX, etc...