Hi,

I'm struggling to understand and fix why the back of the CC3 base PBR character has these lines across the back in particular that almost look like digital fake stretch marks.

I attached an image of the base CC3 female with no modifications whatsoever to the model/textures or project settings

This is a screengrab from my Win 10 Pro 64bit GTX 1070 6950x Intel, 64gb ram machine.

I knew someone would finally turn them around
It is a known issue with spot light. Just replace it to directional light or set the shadow to 4K

Please see this ticket: https://www.reallusion.com/FeedBackTracker/Issue/Change-lighting-in-the-default-project