With elves I always felt their appearance, aside from being perhaps a bit more petite and pointy eared than humans, wasnt ever what really defined them. Their longevity and connection to magic/nature has always been much more important than how they look; their culture too.
Well yes, inside the game world itself, that's true. But that doesn't change the fact that *if* you are going to make an artistic representation of these races, then you HAVE to concern yourself with it, because that's what art does. That's the whole point of the art in the first place.