Strange lines appear on the surface of the model

Bug reports
These textures appeared after turning on Pbr mode and post-processing. They would change after moving the model or turning the angle. They still existed after rendering, but only existed on some solid models.

The picture is here, I forgot to attach the picture and sent it away

That’s probably self shadowing either from lights or ambient occlusion, I suspect occlusion.

In the ambient occlusion settings, raise the curvature bias slider by small amounts until the lines disappear.

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Thank you! It seems to be what you said. After I adjusted the curvature deviation, those things no longer exist.