Hello! 

I need some help please figuring out what could be causing the Cycles renders of my characters to have these faint white grid lines:


My EEVEE renders do not show these same grid lines:


Here is close up comparison:


They look like grid lines from the mesh, but I am not sure.  I've replicated the results in a pretty simple scene where I just use the default import settings from the CC import tool, and using the CC3 Scene Lighting preset:


My render settings are pretty close to the defaults as well:


I prefer how the skin is rendered using Cycles more than EEVEE, so any guidance on how to fix what is going on is appreciated.  My Blender version is 4.2.3 and the import plugin version is 2.1.9

Thank you in advance!

I have the same issue. When I use Blender 4.2 or older I get this issue. It only occurs on the skin shader, everything else is just fine. When I use 4.3 I get a skin shader error, but the issue does not occur. I've also switched to CPU rendering, but no luck there.

I've also added a screenshot, Don,t pay attention to the orange outline or black line on top. Look at the throat area or the nose. 
All other props or clothes are not affected

Edge artefacts in the subsurface scattering on the skin.

Best way to reduce it is to subdivide the body mesh, at least 2 subdivision levels should remove it.

In the Scene Tools panel there is a Cycles Setup button, which sets up Cycles, rebuilds the selected character's materials for cycles (if you haven't already), separates the eyelashes and applies subdivision modifiers to the character. It should resolve all these cycles issues.