Just for the sake of clarification, transformation is only intended for people or object in the process of changing, correct? It's my understanding that we don't simply stick this tag on any and every post where a character is depicted in a radically different form than usual. Otherwise it would apply to practically every example of younger, genderswap, monsterification, mechanization, etc.
I'm only asking because from time to time I see something tagged as transformation when it appears that the person or object in question may have always been this way, like post #495479 or post #3033314 (rating:questionable). Should the tag be more precisely defined to exclude such images? Do we make an exception for post-transformation images where it's clear that the subject has just been changed, as in post #2870774?