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Strange blue tint on nails and skin?

dorfkiddorfkid Posts: 9
edited September 2021 in Blender Discussion

Hey guys,

So I am using the official DAZ > Blender bridge with the Araminta HD Character.
If I render the image in Blender there is a strange blue "glow" around skin borders and also the nails look blue and totally off.

For this scene I am only using one white light and cycles render with 512 samples.
LOD 1 or 2 (tried both)

I put in some close ups of the render so you can see what I am talking about.
Any ideas why this happens?

Unbenannt-2.jpg
565 x 299 - 67K
Post edited by Richard Haseltine on

Comments

  • dorfkiddorfkid Posts: 9

    Since there is no answer yet I tried out another character (Fabian HD) and its the same issue.
    See the photo attached, ignore the eyelashes, its about this blue tint (viewport in blender, but render looks the same).

    Any ideas?

    Screenshot (99).png
    1496 x 796 - 1M
  • RL_MediaRL_Media Posts: 339
    edited September 2021

    You would probably get more help in the blender section. Off the top of my head, I think it's a problem with the way random walk calculates.

    Post edited by RL_Media on
  • CHWTCHWT Posts: 1,179
    RL_Media said:

    You would probably get more help in the blender section. Off the top of my head, I think it's a problem with the way random walk calculates.

    I agree. Some users may tweak (or even set their own) the materials in Blender.
  • Richard HaseltineRichard Haseltine Posts: 100,753

    Moved to Blender Discussion and duplicate thread removed - if you wish to move a thread please edit the first post rather than starting a new one.

  • Krys KryngleKrys Kryngle Posts: 304
    edited September 2021

    CHWT said:

    RL_Media said:

    You would probably get more help in the blender section. Off the top of my head, I think it's a problem with the way random walk calculates.

    I agree. Some users may tweak (or even set their own) the materials in Blender.

    Yes, it is caused by the random walk SSS.  If you switch to Christensen-Burley in the principled BSDF, you won't have this issue but the SSS won't be nearly as good.  To avoid it you'll need to avoid having intersecting meshes as much as possible.  Anytime the character mesh intersects with itself you will see the greenish blue tint.  I have not figured out how to avoid it at the fingernails and toenails yet other than to edit in post processing.  For areas like arm and leg intersection, you can sculpt it using inflate and crease to reduce the unwanted color.

    Post edited by Richard Haseltine on
  • dorfkiddorfkid Posts: 9

    thank you Krys, this helps a lot!

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