My instructions for this were just that it had to be a Cinderella dress that "looked like the sun". I'm not certain which version we are dealing with, but that pretty much sounds like Peau D'ane to me. Or Catskin, or Sapsorrow, or Princess Furball, or... You get the idea. Princess Furball was pretty much my jam back in elementary school. That and The Paperbag Princess.
So, anyway. Peau D'ane is a Cinderella story with a princess who goes to three balls, wearing three beautiful gowns: one as silver as the moon, one as golden as the sun, and one as sparkling as the stars. There you go, that is pretty much all you need to know.
I was given a plain little white romantic tutu and an ugly (and boxy) thrift-store Indian (?) skirt and blouse of orangey cationic chiffon with beaded front panels. And then told to do whatever. But without being able to fit the dress on the girl who will be wearing it, so it needed to be somewhat adjustable, stretchy, and forgiving. I was also instructed to add sleeves come hell or high water. This is what I ended up with using only the materials provided: