what causes this pixelation on my sims face?

this only tends to happen with certain makeup products, it’s nothing to do with the skin overly they have on as i’ve both changed it and removed it but the issue still persisted.

could it be just bad cc or is it something to do with my graphics settings potentially? i play with sims on high, not very high, as i have a macbook and im not tryna wait 3-5 business days to have my sim do a friendly introduction 😭😭

just wondered if anyone could explain what it actually is, as i have this issue with a few of my makeup products, it’s more so visible when the opacity is lowered.

thanks in advance! 🫶