A centauress commission I did a few months ago for 
As transforming yourself was being some sort of fashion and practical (mermaids can swim, centauresses can run faster), she decided to transform herself into a centauress.
She had to go into the transformation room naked, but, when the process had just ended, someone opened the door, and she just had the time to put around her the towel that was given to her when she entered.
Anyway, I'm sure she is quite happy by her new shape.