You can use volumetric lights I guess. I've never tried it with more than one though (you know.. me and Poser lights...) but I can't see why it shouldn't be possible.

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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.