[MRTK3] UI tearing is really bad in URP

[pajama]

This issue has been migrated a new MRTK repository, and the status of this issue will now be tracked at the following location:

• https://github.com/MixedRealityToolkit/MixedRealityToolkit-Unity/issues/246

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Describe the bug

I'm using URP, but it's possible this is also an issue with built in. I have a script that submits my ui canvas rect to the depth buffer It works great to stabilize ui holograms in mrtk2. I'm assuming mrtk3 is using depth for hologram stabilization still, but it seems to not have any effect. Could this be a symptom of URP or MRTK3?

Your setup (please complete the following information)

• Unity 2020.3.38f1
• MRTK3.preview11

Target platform (please complete the following information)

• HoloLens 2

[pajama]

this seems to just have been a perf issue. disabling msaa and depth/opaque textures on the render pipeline asset fixed tearing, likely because the depth reprojection stabilization requires 60fps