So would a "corrupted" aura look different from heavy essence loss or near death or addiction? I read the Aztlan Sourcebook and it mentioned a black writhing aura? I thought it was harder to tell if an individual was corrupted.
Obvious gaps like those who get cyberware and suffering at the hands of a critter with Essence Drain are considered the black writhing parts. Other kinds of mods are more subtle(bioware, geneware) or actually smaller(Nanoware).