For very fine detail set Min shading rate to 0.1 in the render settings.
For laches, I mostly add a bump or small displacement to get them "fatter" or show better.
Takes some getting used to.
Also, reducing the Min shading rate will increase render times. So test a bit to find your optimum settings.
Such a low value it is only realy usefull for close ups, or very detailed work.
But you might need it.

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