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hugoar
hugoar
Up and Coming
April 25, 2023

Passthrough with Unreal Engine 5.1.1. underlay

Hello I try to setup a simple AR project that runs on PC with Oculus Link on a Quest Pro with a passthrough background and 3D objects over it. I have followed the official documentation https://developer.oculus.com/documentation/unreal/unreal-passthrough-overview/ and manage to have see a passthrough but it is always on top even if I configure it with "underlay" option.

What I am missing to make it works? What are the important settings to have in mind (for instance I have Enable alpha channel through tonemapper)? Does Forward/defered rendering have an issue on the result? DX11/D12?
Also is it necessary to use the Oculus fork of Unreal or a regular Unreal with MetaXR plugin is ok?

 

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    hugoar
    hugoarAuthor
    Up and Coming
    July 24, 2023

    Does anybody manage to apply passthrough to a specific object with PCVR (like a window passthrough object in the CG world)?

    the documentation is simple :
    material with transluscent, unlit, opacity 1 and write only alpha true.

    this doesnt work for me. any solution? 

    amx95
    New Participant
    August 20, 2023

    Hello everyone! I have a big trouble. I can't enable passthrough in any project except oculus fork passtrhough sample project. It's just don't want to work.
    I use meta quest 2

    Coolcatintown
    Inspiring
    April 14, 2024

    Thanks amx95! This Solves my problem. For everyone who encountered the same situation, that setting pass is Project setting - Engine - Rendering - Postprocessing - Enable alpha channel support in post processing - Allow Through ToneMapper

    Babaq3228
    New Participant
    September 11, 2023

    Did you manage to solve the problem? I'm using Quest 2 and UE 5.2 with the MetaXR plugin. I just need to turn on the cameras at the touch of a button. I did everything as described in this article - https://developer.oculus.com/documentation/unreal/unreal-passthrough-tutorial/?locale=en_GB

    Babaq3228
    New Participant
    September 11, 2023

    And I forgot to say that I don’t package the project with a build, but work from the editor

    hugoar
    hugoarAuthor
    Up and Coming
    September 13, 2023

    I have experienced another bug with passthrough that appears randomly on build. Sometimes the passthrough appears very dark and red, it is very strange. Generally I close the oculus app and reboot the headset and it works again. I wanted to know if some of you experienced the same bug? Do you have an idea of what it could be?

    YourMindUE
    New Participant
    September 21, 2023

    Hey, I'm also facing issues with passthrough. When play in editor everything works fine but when a package it for APK file and play it on my Quest, its just show passthrough mode like its appearing on front layer.
    Need help!!

     

    abhijeetadoptxr
    New Participant
    September 23, 2023

    I am having the same issue, the Passthrough Underlay with 3D Mesh work fine in the Oculus Fork Sample project, but when I try to the exact same documentation, only the Passthrough shows and no 3D Mesh.

    Please help.

    Coolcatintown
    Inspiring
    April 14, 2024

    Did you solve the problem yet? I suddenly come across this situation. I have no idea what's going on.

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