It doesnt matter how it is rendered.
ZoS has been asked this numerous times. Their response was capes, done right would cause too much of a performance hit to be viable in the game. Their comments are recorded in an ESO Live if you want to hunt it down.
You can argue with the people that built the game about it but until things change capes will not be a thing in ESO.
The best we could expect would be pretty much stiff as a board capes stapled to the character's rear end like the Breton costume, not the flowing capes that require cloth physics that people want.
Curious_Death wrote: »better to make every1 in cyro wear same alliance based costume by default! would increase performance as good fuel for engine.