I'm still not able to find a suitable word about how happy I am that the upper part of the dress came out like that! Wasn't thinking it would work half that well! ♥
A lot of thanks to Yanis Cosplay for helping with the gluing part!
Craft Foam, E6000 (glue), acrylic paints, nail polish, clear acrylic coating, hotfix rhinestones in three sizes, resin, silicon
How it was done:
1.: Sew the dress as a whole (with lining and everything)
2.: Cut little Craft foam rectangles till you want to cry
3.: Round out there edges and cry more
4.: Get your flatmate to glue them on. Make sure there are overlapping without any kind of order.
5.: Add sequins at the bottom to create the desired running out ice effect
6.: Paint everything in a light blue acrylic paint two times
7.: Create a gradient with a darker blue from the bottom
8.: Make some effects with white and blue paint and nail polish
9.: Seal everything with a nice and sheeny clear paint. Three times...
10: Have a meltdown while running around in the city because you are not able to find the rectangle Stones you want. (Gain some knowledge: The form is named Baguette...)
11.: Make your own silicon mold from 6 stones you have at home
12: Make 4 of them because no one is that patient.
13.: Cast 48 Stones with clear resin and paint half of them whit half transparent nail polish
14: Glue the stones and the Silver Rhinestones on the dress.
15.: Die happy