OK another test. Yes you can ideed plug in a texture map. Put it instead of the granite and this is the result (still with some other numbers in the Math Function 2 and 3 too) (oh and the W stands for WITHUOUT ;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.