oh, i think we're at cross purposes.  so, someone, i can't remember who now, posted that they wanted to know how this might work with an image of lace.  but it was after discussing the notion of opacity or transparency as a variable (but before the full explanation). so my point was that once bagginsbill said opacity was a variable, to me there was no need to show it as lace at all.  if you give me an equation with O opacity, i'm perfectly content with understanding that O can be anything you want to put there.

that said, maybe there's an aspect to opacity i'm missing, and you'd need to do something more than just define O.  maybe you'd want density to vary too, or some other aspect i'm not seeing.

personally, i'm not that into procedural lace, or most generated geometric patterns.  i've seen way, way, way too much of it over the years to really appreciate it.  there's even tons of it in the marketplace.  not built with Poser, but the effect is the same.  for me, it's up there with lens flare, heavy drop shadows and other common 2d stuff.  it just didn't occur me that's what you meant.