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  4. Unexpected LevelOfDetail behavior in Qt3D
Forum Update on Monday, May 27th 2025

Unexpected LevelOfDetail behavior in Qt3D

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  • S Offline
    S Offline
    Suli Sahne
    wrote on last edited by Suli Sahne
    #1

    Hi,
    i need some help with LOD in QT3D.
    It's a scene with few cylinders. Every cylinder uses the Qt3DRender::QLevelOfDetail class with the DistanceToCameraThreashold to switch between three Meshes of decreasing details. When moving the camera around, I would expect the cylinders around the camera viewcenter and between the camera position and the viewcenter to be updated. But as you can see in the video, that's not the case. Instead it's some how dependent from which side the camera is looking at the cylinders:

    alt text
    videolink

    I use 5.12.2 and tested with WIN7, WIN10 and Ubuntu. Any ideas what's going on?
    Here is the code: https://gitlab.com/sulisahne/qt3dlevelofdetailtest

    Thanks for your efforts..

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    • Q Offline
      Q Offline
      QKelteseth
      wrote on last edited by
      #2

      Bump for interest

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      • EddyE Offline
        EddyE Offline
        Eddy
        wrote on last edited by
        #3

        for anyone interested.
        Here is the link to the bug report on Jira:
        https://bugreports.qt.io/browse/QTBUG-75373

        you can upvote it there to give it more attention

        Qt Certified Specialist
        www.edalsolutions.be

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