Sounds odd. Usuallt stuff like tattoos look blurry and strange in PREVIEW but look ok once rendered. Can you please post a picture of the tattoo rendered and unrendered? :o)

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You just can't put the words "Poserites" and "happy" in the same sentence - didn't you know that? LaurieA
  Using Poser since 2002. Currently at Version 11.1 - Win 10.