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  1. Qt
  2. QTBUG-134608

Low performance of DirectionalLight when casting shadows

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Details

    • Bug
    • Resolution: Unresolved
    • P2: Important
    • None
    • 6.8, 6.9.0 Beta3
    • Quick: 3D
    • None
    • Samsung SM-X900 (Qualcomm SM8450)
      Qualcomm SA8155P
    • Android

    Description

      When using a DirectionalLight that casts shadows,  the closer the camera to objects that receive the shadow, the FPS gets lower.

      The bug is not reproducible when the DirectionalLight is replaced with a PointLight that casts similar shadows .

      Two videos of Dice demo example one with DirectionalLight & the other with PointLight is attached.

      directionallight.mp4pointlight.mp4

      Attachments

        1. directionallight.mp4
          4.41 MB
        2. pointlight.mp4
          18.22 MB
        3. Screencast_20250311_134937.webm
          2.90 MB
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            qt.team.graphics.and.multimedia Qt Graphics Team
            soarmin Soheil Armin
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            Dates

              Created:
              Updated:

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