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DAZ|Studio F.A.Q (Updated: 2020 Sep 04 1:56 pm)
Subject: Weird lines in water when rendering?
I can't say for sure as I don't have this particular product, but you might want to check the bump map and normal map settings and see if something brick is being used. Also check what texture is underneath the water on the plane under it. If it's brick like it could be showing through. If you are using Iray you might want to turn on caustics, makes a big difference on water. Just some ideas you might try.