Lines Appearing on Character Legs and Shoulders when using HDRI Scenes

Please reference the attached render images, and in Image 1, look at the upper thigh and mid shoulder areas of this G8F character. This happens with only some of my characters, though not all of them, and it happens with only some of my HDRI light and scene sets, though not all of them, argh. Under the Render Settings, Spectral Rendering tab, if I turn off the "Spectral Rendering Enable" field (it is "on" in Image 1 where the lines appear), this phenomenon disappears, but note the subtle beauty of the shadow and lighting effects are not nearly as attractive (Image 2). So why is this happening, and how can I eliminate this from happening with the Spectral Rendering Enable field staying "On", so that I can maintain this beauty of this HDRI set (which is Norman Castle HDRI, as reference, purchased on DAZ3D). Thanks for any help that can be provided!

Image 1.png
510 x 665 - 661K
Image 2.png
510 x 665 - 603K

Comments

  • Those are the seams of the body textures I think. Why they are visible I have no idea. 

    It should also, if I'm right, happen between the head and neck. Try a render with no hair and see if you can see the seam where the head and neck meet.

    Is there any commonalities between the figures where it happens?

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