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HDRP SSS Thickness Map is dirty.

Discussion in 'Graphics Experimental Previews' started by yoshida_mamoru, Jul 5, 2020.

  1. yoshida_mamoru

    yoshida_mamoru

    Joined:
    May 15, 2019
    Posts:
    12
    名称未設定-3.png
    When you use the Thickness Map in Unity's sss, you can see the dirty jaggies in the attached image is displayed.
    Do you know how to fix it?

    Unity2019.4
    HDRP7.3.1

    Material:
    HDRP/Lit
    Type:subsurface scattering

    Profile
    名称未設定-3.jpg

    ThicknessMap
    hand_ao2.jpg
     
    Last edited: Jul 5, 2020
  2. Passeridae

    Passeridae

    Joined:
    Jun 16, 2019
    Posts:
    395
    These artifacts are coming from your thickness map. Edges of your UV layout are not orthogonal and therefore have some aliasing. Combine I with low resolution and you get artifacts. There also may be some issues with UV unwrapping itself.
     
  3. yoshida_mamoru

    yoshida_mamoru

    Joined:
    May 15, 2019
    Posts:
    12
    The resolution of ThicknessMap is 2048, which I think is not that low.

    After further investigation, it seems to get dirty in the spotlight.
     
  4. Passeridae

    Passeridae

    Joined:
    Jun 16, 2019
    Posts:
    395
    Have you tried to disable the thickness map?
     
  5. laurentlavigne

    laurentlavigne

    Joined:
    Aug 16, 2012
    Posts:
    6,449
    watching this one because substance painter makes dirty auto UV