I have Blender 2.93.5 (2021-10-06) and am using Cycles (CPU only) to render scenes with Rain v2.
For a headshot, I noticed a blue-colored seam between the head and neck (top part of image below).
At first I thought this may be due to the textures having bad edges, so filled them in a bit in Photoshop. No change. Finally found that it was one of the SubSurface Scattering nodes, so disconnected it (for head and body material) (middle part of image below).
The blue seam was fixed, but the transition between the neck and body is not smooth. Is this something to do with Phong shading at all (odd angle)? I didn’t see anything obvious when looking at the mesh. But this line is indeed along the cut/seam for the textures. (bottom part of image below).
Sorry for the single image; new member, so can only upload one per post:
The majority of my renders with Rain will be full body, so it’s not crucial to find a fix for this. Still, I’m wondering how to address this for the future.
In case it makes a difference, I’m using an iMac Pro with Radeon Pro Vega 64X.