The classification of gender (Male, Female, Androgynous, None) seems the easiest to make, followed by two categories for race: Tall (Human, Elf, In-between, Half-Orc, Undead) and Short (Beards, No Beards). The category of which class the person varies too much: Some portraits are instant giveaways as to what class they would be perfect for (the brawny Human Male wearing Plate armor and whacking a Skeleton with his 2-Handed Sword is definitely an Undead Hunter), while some completely defy categorization (the near-naked Human Female holding a a dagger as she poses seductively could be a Mage....or a Thief....or a Monk....or a Kensai....etc).
I have only ever seen one good picture of a Female Half-Orc. It was official art for either NWN or IWD, and I believe it was painted by Justin Sweet.
MAN, did it suck. He face is all right and she looks burly enough, but I just don't see anyone standing in a snowdrift wearing a leather bikini.
Sorry. It wouldn't be bad if the woman in the snow was
furry or something, but not only was she
not furry, she actually seems to shave her legs on a regular basis. And then goes & stands in the snow. Anyway, I think you can do a Google search or something and eventually find the original artwork, but I made what I think is a much better version by cropping out most of everything & playing with the color scheme--It's still not quite done, I should have accented her lower canines a bit more. Anyway, it's here:
www.geocities.com/sixospades/mod/edna.htm