Actually, it IS true, and not mind boggling at all. They are indeed 3d models, first modelled, and then rendered to portraits AND to sprites. 3d does not necessarily need to by dynamic.I thought that both the character sprites and backgrounds in infinity engine games come from 3d models placed in a perspective, and the the portraits in torment are touched up forms of those 3d originals.
That is, now that i think about it, pretty mind boggling if true.
Back to the topic... I have finished replaying Torment with UB just yesterday (thanks a lot to everyone involved!), and figured I could give something back. So here is the collage of Vrischika, based on aasimar. I did not add the wings, because they are not on a sprite, and I tried not to take any artistic liberties with her. Let's consider them... folded, I guess.
I have put her on a background that resembles her shop, but in reality she looks better on your standard Sigil background - the lights in the original scene were set up to emulate open space, and the contrast on her face is just too strong for any indoors environment.

