[danielsangeo]

When I see the term "rapid change", I think of it over the course of a minute or two, rather than "over a single night" (unless it's more of a 'poof' transformation--where the transformee goes to bed as a man, then the scene cuts to a woman in the man's clothes waking up, which is not Process, if you ask me).

When asking about the length of the transformation, you should make it fit the plot of the story. You don't have to describe the plot here, but it's something for you to keep in mind.

I'd like a more drawn-out transformation myself, but it really has to fit the plot of the story, which you're keeping under wraps here.