What a beautiful dress! You did a great job with the lighting here, too; most cosplay photographers would have been tempted to bulk up the contrast or brighten the hell out of everything, but you kept it very natural and it's gorgeous just the way it is.
Beatutifully exicuted for what it is! Especially seeing how that looks like velvet? And the lace must have been such a pain not to mention the hair! Well done!!!! I was a massive fan of the art when it came out so to see it in cosplay makes me happy.
I know how hard this must have been because I NEVER would have been able to do it but just some advice- I'd change the necklace to a simple velvet or satin choker or pearl drop on silk cord to keep it more accurate and if you can add some volume to the bustle but that's me being mega nitpicky.
If I saw this at a con I'd die because I'd be tripping over my tongue WONDERFUL!!!! Amazing work! I hope to see more!