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Forehead discoloration with hair

areg5areg5 Posts: 617
in Daz Studio Discussion

I'm stumped.  I'm having this issue with discoloration of the forehead when using hair.  It seems to outline the skullcap, but if I turn off the opacity of the skull cap nothing changes.  I suspect it's a lighting issue.  The lighting in this scene uses several ghost lights, the overhead light panels are emissive and there are spot lights mounted on the camera. The camera headlamp is off. I have tried turning lights off and on.  I have tried fiddling with the hair surface settings.  It does not happen with outdoor lighting.  See attached.

example of hair issue.png
529 x 449 - 320K

Comments

  • charlescharles Posts: 845

    Check the skullcap shader, is it set as the Uber "PBR Specular?Glossiness" shader?

    In viewport smooth display mode, is the skullcap visible and does it lineup exactly with the discolored area seen in the rendered image?

     

  • areg5areg5 Posts: 617

    charles said:

    Check the skullcap shader, is it set as the Uber "PBR Specular?Glossiness" shader?

    In viewport smooth display mode, is the skullcap visible and does it lineup exactly with the discolored area seen in the rendered image?

     

    I misspoke.  This hair model does not have a skull cap.  I meant the scalp.  Yes, the discoloration lines up with the scalp The shader is set to weighted.  Changing it to the other settings does nothing. 

  • Richard HaseltineRichard Haseltine Posts: 100,493

    Qyite possibly the opacity map being used on the scalp is not in fact pure black in the affected area.

  • areg5areg5 Posts: 617

    Richard Haseltine said:

    Qyite po

     

    ssibly the opacity map being used on the scalp is not in fact pure black in the affected area.

     

     

    Changing the base color of the scalp map to black does nothing

  • charlescharles Posts: 845

    remove the map for the scalp and see if that makes any change.

     

  • areg5areg5 Posts: 617

    charles said:

    remove the map for the scalp and see if that makes any change.

     

     

    It did not

  • areg5areg5 Posts: 617
    edited February 2022

    My fix:  I re-rendered the scenes over again without the hair and used photoshop to fix the skin tone on the images with hair.  It's a good thing my rig renders riculously fast, but I do hope at some point a real fix for the issue can be determined because I'm sure I'll see it again.

     

    Post edited by areg5 on
  • charlescharles Posts: 845

    Good. Althought I don't think post work was the ideal solution.

     

  • vinaytejareddyvinaytejareddy Posts: 11

    charles said:

    Check the skullcap shader, is it set as the Uber "PBR Specular?Glossiness" shader?

    In viewport smooth display mode, is the skullcap visible and does it lineup exactly with the discolored area seen in the rendered image?

    Hi, mine is set to "PBR Specular?Glossiness" and "skullcap visible and does it lineup exactly with the discolored area seen in the rendered image" , what to do now ?

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