Renford A. Terwilliger describes them in "T'sen-Ang: Horror Among the Dark Elves" as beings with ivory skin and black eyes, which, truth be said, sounds quite exotic, alienesque even. Less than two thousand years = a few elven generations is hardly enough to naturally develop such distinct features, but I used to rationalise that perhaps they altered their biology for whatever reason magickally, be it a side effect of some dark rituals or an intended action performed simply to look scarier. But then there's Z'an Al'urin, who's portrait looks completely normal, indistinguishable from a normal elf. Turns out that ghastly appearance Terwillinger witnessed was either body paint, phantasm/morphing magick or just something your eyes are likely to see when you are lost and terrified while surrounded by hostiles in the middle of an evil-looking forest at night. That being said, the differences between elves and dark elves seem to be purely ideological rather than biological, so why are they treated as a different race, having their own racial name, icon and such?