Thank you very much! Your cosplay is gorgeous as well!
I've been asked a few times about how I made it so I might just put up some progress and tutorial photos up soon. But here's a breakdown:
-I used goldenrod Duck Cloth: material that's thick enough to not fold or bend too much when I moved around.
-cut, shaped and sewed the cloth like it was a corset but with only three panels. (the sewn parts are on the side of my waist. I needed it to shape the curve of my waist. If I cut it out as one long straight waistband it would bend and move around and not stay still.
-I have the game on my PC so I used a model viewer to get the general design of the lines and hand painted them on with acrylic. The duck cloth held onto it really well.
-I found some sturdy materials similar to boning for the back of the band and sewed them in vertically. Then I sewed a few hooks to help close it. Very similar to a corset but I placed them close enough so that you can't see the hooks.
It's kind of hard to describe with some photos but I hoped this was able to give you a general idea.