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Bug (Case 1276894) Shadow popping on large objects beyond first shadow cascade

Discussion in '2020.2 Beta' started by CodeBison, Sep 10, 2020.

  1. CodeBison

    CodeBison

    Joined:
    Feb 1, 2014
    Posts:
    297
    I've noticed shadow popping when shadow cascades are in use in 2020.2. Shadows beyond the first shadow cascade exhibit popping behaviour in scene or game camera. I created a video contrasting the behaviour with 2020.1.3f1, which behaves as expected:

    This behaviour only seems to occur with large shadow casters that extend past multiple sides of the camera frustum. The parts of the environment in the video linked above that exhibit this behaviour are all a single mesh, for example.

    I've created a minimal repro project here: https://drive.google.com/file/d/1DKndlRZci-4yY2G-fIwj7r682zEDxDo7
    To reproduce issue with the provided project:
    • Open ShadowTest scene
    • Select camera and align scene camera via GameObject -> Align View to Selected
    • Note that only the first cascade of the cube's shadow is visible in the scene camera:
      upload_2020-9-10_14-15-5.png
    • Select the cube and uniformly reduce its scale until the cube's bounding box is only overlapping one plane of the camera's frustum.
    • Note that the cube's shadow shows properly:
      upload_2020-9-10_14-15-39.png
    Edit: Filed as case 1276894
     
    Last edited: Sep 10, 2020
    ProtonOne and Peter77 like this.
  2. Peter77

    Peter77

    QA Jesus

    Joined:
    Jun 12, 2013
    Posts:
    6,650
    I was going to ask to submit a bug-report, then saw the edit. Great that you already did that! :)

    BTW, if you add the bug-report case number to the thread title, it makes it easier to see the forum-post<>bug-report relationship. Like here for example:
    upload_2020-9-11_8-43-16.png
     
    CodeBison, LeonhardP and NotaNaN like this.
  3. LeonhardP

    LeonhardP

    Unity Technologies

    Joined:
    Jul 4, 2016
    Posts:
    3,143
    Oxeren, CodeBison and Peter77 like this.