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Bug (Case 1280162) "Hidden/Preview Transparent" material leak

Discussion in '2020.2 Beta' started by Peter77, Sep 24, 2020.

  1. Peter77

    Peter77

    QA Jesus

    Joined:
    Jun 12, 2013
    Posts:
    6,610
    Reimporting a script causes Unity to create new "Hidden/Preview Transparent" materials every time.

    screenshot.png

    Reproduce
    1. Open attached project or create new one
    2. Open Profiler, select Memory tab
    3. Switch to "Detailed" mode
    4. Press "Take sample Editor"
    5. Expand "Scene Memory" and note the Material count
    6. Reimport "Scripts/NewBehaviourScript.cs"
    7. Press "Take sample Editor"
    8. Goto step 4

    Actual
    Every script reimport new materials are being created, more precisely new copies of the "Hidden/Preview Transparent" material.

    Expected
    No material leak.
     
    Last edited: Sep 25, 2020
    Peter77, Sep 24, 2020
    #1
    mahdi_jeddi and LeonhardP like this.

  2. b4gn0

    b4gn0

    Joined:
    Jul 26, 2019
    Posts:
    119
    Does this also happen when you change a script, or just when doing a manual reimport?
     
    b4gn0, Sep 24, 2020
    #2

  3. Peter77

    Peter77

    QA Jesus

    Joined:
    Jun 12, 2013
    Posts:
    6,610
    It happens in both cases.
     
    Peter77, Sep 25, 2020
    #3

  4. b4gn0

    b4gn0

    Joined:
    Jul 26, 2019
    Posts:
    119
    That is a great find, especially if it's the reason of the hogging that happens when changing scripts!
     
    b4gn0, Sep 25, 2020
    #4
    mahdi_jeddi and Peter77 like this.