It's been a while since I posted, so thank you for your patience.
Lots of things added since my last update.
And how it looks all together.
Once I felt the textures were good enough, I went back to Zbrush and put Sandal into a pose using the Transpose Master plugin. This was so much easier to use than to try and build a whole rig for something quick. Then I used the cloth brushes to move around the overcoat, skirt, and hair. I used the cloth brushes (mainly cloth pull) so I wouldn't distort too much and lose too much shape.
And then I'm experimenting with lighting setups and different viewing angles in Unreal Engine 4 as well as tweaking materials. For the wings, I'm figuring out how to make the highlights look like they're reflecting a different color like in this reference of pearlized organza (source https://bentextiles.com/media/catalog/large/iridescent-pearl-organza/white.jpg).
My gut instinct is the fresnel node in Unreal, but the way it's currently set up is not producing the results I'm looking for, so a rethink is in order. I'm sure I'll get it eventually, just need a think.
Now this is just the extra cherry on top, but maybe I could sneak in a dagger in her open hand to the side for that extra personality and flair. We'll see.