Hell, if such could be achieved in armors, imagine the potential! You could have glowing effects like those in the daedric armors or even the aetherial shield!
Im not a model maker or cc creator for NWN, but since its possible to have glowing light sabre type sword models etc in game, I suspect there must be the potential out there to have particle effects and glows etc attached to certain parts of armor models?
Far as I am aware, the glows wouldn't be able to be tintable, so as armor, the gems would have to be always the same color and glint the same color. Probably why it's not been done.
gaoneng I think work on it some in the past. I messed with them some. There might be a trick to get the different tinting effect, but I do not want to go into detail until I tested it myself. Cannot wait to see what others come up with. Right now I up to my ears with familiars and animal companions hehe