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  1. Qt
  2. QTBUG-140857

Qt Quick3d automatic LoD: Visual Artifacts with enabled OpaquePrePassDepthDraw on any other object on same scene

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    • Icon: Bug Bug
    • Resolution: Fixed
    • Icon: P2: Important P2: Important
    • 6.8.6, 6.10.1, 6.11.0 Beta3
    • 6.8.4, 6.9.3, 6.10.0 RC
    • Quick: 3D
    • None
    • Linux/Wayland, Linux/X11
    • 5f663a7a5 (dev), 5df1bb2a1 (6.10), d49f12de0 (tqtc/lts-6.8)

      Auto LoD and its related bugs.

      These visual artifacts were detected a long time ago, but only now do I understand the reason for them.

      This only happens if your scene contains any objects with the OpaquePrePassDepthDraw parameter, which, unfortunately, is a frequent case.

      I am attaching an example and screenshots. I am unsure about other platforms, as I could only reproduce this bug on Linux. It will probably affect all platforms, but I can't be sure.

        1. Screenshot From 2025-10-06 12-09-12.png
          Screenshot From 2025-10-06 12-09-12.png
          171 kB
        2. Screenshot From 2025-10-06 12-09-07.png
          Screenshot From 2025-10-06 12-09-07.png
          405 kB
        3. OpaquePrePassDepthDrawAndLODBug.zip
          13.00 MB
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            kskau Kristoffer Skau
            endrii Andrei Yankovich
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              Created:
              Updated:
              Resolved:

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