I will also post the TXI refrences that create.. "cool" effects.. lol
blending additive - I have noticed that this is used in many of the "holo(something eg. HoloVandar)" TXI files so i can assume that unless the game has other scripts for it, this will create a "hologram" (transparensy) effect (I would suggest sticking to a dark-turquise colour as it creates the best effect)
I will test this as soon as i have reinstalled KotOR...
If you're looking for any of the junk I did a few years ago; you can probably still find it all on filefront