CC Brown Mesh Texture Glitch in Game? (Sims 4 PC)
From your pics, I see the sim has CC tattoos on her. Try taking the sim back into CAS and delete her tattoos to see if that fixes it.
I had something similar happen after an update and had 3 sims turn pitch black from head to toe. Zooming in on them, it looked there was some type of overlay on the sim that flickered in and out. After spending a lot of time testing, I found that a CC tattoo was causing it. In CAS, they looked fine but in live mode, they were like pitch black shadows. After removing the tattoo, they went back to normal in live mode. After testing all my CC tattoos, I found others that did the same thing and removed them from my game. Haven't had the issue since.
If it isn't a tattoo causing it, then it's probably another CC item on her that's causing it. So, you'll have to test those the same way, one at the time, until you find whatever is causing the problem.
Hope this helps.
