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Anonymous
December 8, 2021
Solved

Passthough not working with Unity Editor, build/run works fine

 

 I start this with the full knowledge that the loose nut behind the wheel could be me. I had passthrough working, both my stuff and the Oculus demos. I could build and run or test stuff inside the Unity editor by hitting "Play". It was all working right up until I botched an install of 2021 and things stopped. I have since reinstalled (multiple times...) everything.

 

The project I'm testing with is a floating cube in front of the OVRCameraRig. I've gone through all the settings/recommendations from previous community posts, specifically the guide from Anonymous and the youtube video: https://www.youtube.com/watch?v=9u3QQi6Gnx0&ab_channel=ValemTutorials

 

  • Running "adb devices" at the command line shows the device is authorized.
  • Oculus Integration 34.0
  • Oculus Quest version 35.0.0.117.341.<other numbers>
  • Oculus Quest runtime version 35.0.0.118.341.<other numbers> 

I can build and run apps with passthrough, I just can't get them to appear in the headset via the Unity Editor when I hit Play. Sometime I get the hourglass, sometimes I get an outline of the cube, flickering badly. 

 

The error on the console:

Failed to initialize Insight Passthrough. Passthrough will be unavailable. Error Failure_NotInitialized.
UnityEngine.Debug:LogError (object)
OVRManager:InitializeInsightPassthrough () (at Assets/Oculus/VR/Scripts/OVRManager.cs:2283)
OVRManager:InitOVRManager () (at Assets/Oculus/VR/Scripts/OVRManager.cs:1550)
OVRManager:Awake () (at Assets/Oculus/VR/Scripts/OVRManager.cs:1565)

 

Which can be tracked back to the OVRP_1_63_0 DLL call in OVRPlugin.cs

if (version >= OVRP_1_63_0.version)
{
      Result result = OVRP_1_63_0.ovrp_InitializeInsightPassthrough();
      if (result != Result.Success)
        {...   

 

I'm on Window 10 and I've tested with Unity versions:

  1. 2021.2.5f1
  2. 2020.3.22f1
  3. 2020.2.24f1

Same Error... 

 

I doubt it's a hardware problem. Quest plays half life Alyx like a champ over Air Link. Lastly, I've got a box full of good quality USBC cables and I've tried them all. 

     Any thoughts? 

 

    GustorvoAnswer
    Inspiring
    December 9, 2021

    Passthrough simply doesn't work that way you expect it to work! It is designed to work in builds only! This has been made for privacy reasons (so that no one would maliciously record your surroundings). Passthrough data never gets rendered inside Unity, it never reaches the eye buffer, so there is no way of accessing it through your Unity project. 

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    11 replies

    GustorvoAnswer
    Inspiring
    December 9, 2021

    Passthrough simply doesn't work that way you expect it to work! It is designed to work in builds only! This has been made for privacy reasons (so that no one would maliciously record your surroundings). Passthrough data never gets rendered inside Unity, it never reaches the eye buffer, so there is no way of accessing it through your Unity project. 

      Anonymous
      December 9, 2021

      Like I said, loose nut behind the wheel. After I made the posted, I started to think this might be the case, but I could not find a way to retract the post. Anyway, that explains it. I guess I was flipping between builds, scenes and demos so much that later, I was sure I had seen in play mode.  Thanks for clearing it up for me. 

      Anonymous
      December 9, 2021

      First of all it's a great question -- regardless of there being a loose nut behind the wheel or not... 🙂 

      Confirming what Gustorvo said - I've never been able to get Passthrough to work from the Play button in Unity -- you always get an error and have to "unpause" to get the scene to play with a black background instead of the passthrough video.

       

      Just making sure that you do know the trick to see the passthrough on your PC... you have to deploy it to the device and then use Side Quest to view the running app -- that works like a charm!

       

      MetaStoreHelp --- would be ideal to have -at least- a developer setting that allow us to see Passthrough via Unity -- as the features become more complex (ie. object detection, etc) we WILL NEED the ability to do this via Unity and not take the time to deploy ever single update with building apps.  Would love to know that that is at least on the Quest dev team's radar.  Thanks!!

        Gustorvo
        Inspiring
        December 9, 2021

        Agree! @OculusSupport should definitely give us, developers, tools that simplifiy development process, not the other way around!

        ChrisMoonMode
        New Participant
        September 22, 2022

        In case anyone else is struggling by trying everything, the final piece of magic you probalby need to do, that none of the docs or tutorials or anything tells you, is:

        Set the camera Clear Flags to Solid Colour and the Background to Black

        airmouse
        Up and Coming
        December 6, 2022

        Does this solve the "Failed to initialize Insight Passthrough" ?

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