Just popping in to say that.. IF you were to make the Plexiglass material (or any other group) on both sides of the model at the same time, simply switch preview to wireframe. Then you'll select everything.. If the mest looks transparent, then poser will treat it that way. An easy way of for instance selecting all of the hem line in a cloth simpulation :)

 

So many people are afraid of the Grouping Tool, and it' has always been one of the greatest features of Poser IMO :)

 

sits down quietly again

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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.