Building Blocks are not OpenXR Compatible, are they?

Question

So, it seems there are lots of us out here that are struggling with OpenXR. Obviously when you read the instructions we're told that we should use OpenXR because Meta is leaning more towards OpenXR...

...yet all the building blocks are for the old Oculus plugin and don't work in OpenXR. Is that correct?

For instance, setup a Unity project as OpenXR and then drag the Controllers building block in - it attaches itself to the OVR Rig and not the OpenXR rig.

Also, we're recommended to use URP, but that only works with OpenXR, as the OVR Rig generates errors in URP.

So, what is the offical line? Which method are we supposed to be developing with in Unity? And can you link an updated and definitive set of instructions. It seems the ones out there are all OVR instructions and not OpenXR.

If we're supposed to be using OpenXR, how do we get it to display Quest controllers?

Thanks everyone!

JeffNik · Answer

I haven't had any issues with OpenXR / URP, and I'm using the building blocks for many features.
I'm puzzled by your statement:
"it attaches itself to the OVR Rig and not the OpenXR rig."
Are you using BOTH? My process has been: 1) Install the plugin manager, 2) enable the "OpenXR" plugin (instead of the Oculus one), 3) add an OVRCameraRig prefab -OR- drag a camera rig building block
I dont have (or add) an "OpenXR rig".
&nbsp;

Kotowicz.Si2G · Answer

If you use the OVRCameraRig, it generates errors in URP.&nbsp; Also, if you're not going to use the OpenXR rig, why install OpenXR?&nbsp; The OVRCameraRig is for the original Oculus plugin.

JeffNik · Answer

I just read up on the topic, and I see that you are correct.I knew that Meta was pushing us to OpenXR. I have been using OVRCameraRig with the OpenXR plugin, and getting no errors or problems - so I assumed that that was the correct way to set it up.&nbsp; I had not seen any documentation that mentions the "OpenXR Rig". I'm looking forward to learning more tonight after work.
&nbsp;

Kotowicz.Si2G · Answer

That's interesting that you are able to use the OVRCameraRig without any problems when OpenXR is enabled.&nbsp; I get numerous issues:1) [OVRPlugin] [XRCMD][failure] [XR_ERROR_ACTIONSET_NOT_ATTACHED]:2) Cannot use (Paraphasing here) - centre camera as it's built in renderer onlyFor a good while I was using the OVRCameraRig with the Oculus plugin (not the OpenXR plugin) and the renderer set to Built In Render Pipeline.&nbsp; This worked well on Quest 2 and I was getting really good frame rates. However, someone told me that Meta may not allow it on their store, because it's not OpenXR, and someone else noted that it didn't run with very good framerates on the newer Quest 3 devices.&nbsp; That and I added an asset that was URP only, so I decided to move across to URP and then all the OVRCameraRig stuff broke and my framerates where less than half what I was getting before.&nbsp; Enabling the OpenXR plugin and adding the OpenXR rig fixed the frame rates, but the building blocks don't work with it.&nbsp; THe main one I want is the game to display controllers, not hands, as it's space shoot 'em up and I want the player to see the controllers.Any way, I read a page from 2020 where Meta said they are migrating the OVRCameraRig to an OpenXR back end.&nbsp; So it's not clear what's the correct approach.&nbsp; I'd be interested to hear your thoughts after you've done some reading.If you find an up-to-date document please could you provide the link?Good luck!

JeffNik · Answer

SO - I'm not finding any current documentation about whether they want us to use the "XR Origin (VR)" rig or the BuildingBlock route. I *CAN* tell you that my standard setup of using the OpenXR plugin in the plugin manager along with the BuildingBlocks (Camera Rig block, passthrough block, interaction blocks) and not using the Unity OpenXR Interaction stuff has been working fine for me, and I'm confident it's utilizing OpenXR instead of the Oculus plugin. Last night, I tried to go your route, using the XR Origin (VR) from the OpenXR Interation library. I got a scene working but could not use the BuildingBlocks - as you say it added a Meta rig and used that instead - so I'm confident your original post about the blocks not being OpenXR friendly was correct. I'm fairly familiar with building the Meta features by manually adding the scripts, etc, but have found the building blocks to be very convenient for getting features implemented quickly - so I'll probably continue to use them instead of the Unity OpenXR stuff going forward.

Let me know which way you decide to go - I'm curious.

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Building Blocks are not OpenXR Compatible, are they?

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