OK thanks Marsel.
So with Pflow I could tell just one face on the inside of the text object to be the emiiter, right? That may work better becasue I cant really cut off the tops of the letters to have the emitters be "outside" of the text (though I could just replce them with another render pass and then composite them back together.
Could I not just place the emiiters inside the hollowed out text? I'll play around now that I have a direction to try. Thanks for all your hard work. Lucid looks pretty great so far.