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strange black square when casting raytracing shadow on folliage

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    strange black square when casting raytracing shadow on folliage

    I have a troublesome problem when the light casts raytracing shadows to the folliage. If the size of the object is small, everything is normal, if i scale the size, black spots will appear
    Click image for larger version

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    The default size of the ball is fine

    Click image for larger version

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    When scaled the size in to 3, such dark square appear

    Click image for larger version

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    If it is not a folliage object, it will not have such a problem even if it is large. I found the same for 4.24, with the same results on 2080 or 1070
    Is there someone who can help to solve
    thank you

    #2
    bump
    hope someone to help

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