Note bottom right.

I'm getting these frequently. They are parallel marks, reasonably evenly spaced - little dashes, as it were.

I'm guessing they're not AO artifacts, as they stay consistently in the same place if I move the camera... but I'm not entirely sure if AO artifacts would do that. (?)

This example shows the effect under the jawline, but I frequently get the marks on the thighs. I think I've had them on the arms too.

It happens with different textures, and even with very high rendering quality.

Any ideas?

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Hardware: AMD Ryzen 9 3900X/MSI MAG570 Tomahawk X570/Zotac Geforce GTX 1650 Super 4GB/32GB OLOy RAM

Software: Windows 10 Professional/Poser Pro 11/Photoshop/Postworkshop 3