It has been a while since I worked on content editing in FW and so I can only answer with general ideas.
It's better that you try to study it on your own to figure things out.
I-Basics:
1)Introduction:
-WING_ESSENCE is the structure responsible for adding fashion wings in Forsaken World!
2)Version Requirements:
-WING_ESSENCE is available for Servers from 262 and Above.
-WING_ESSENCE is available for Clients from 610 and Above.
3)Bonus:
As a bonus, for fashion wings preview in gshop.data ,they often use the giant(Protector) wings.
II-General Method to understand WING_ESSENCE:
1) Trace the models paths used in WING_ESSENCE through path.data.
->As far as I remember, fashion wings is linked to gfx.
2) Extract Gfx.Pck
3) Open .gfx or .ecm files with notepad or notepad++ and keep following until you find the relevant models used for wings.
4) It's expected to find some parameters in gfx or ecm about wing position in gfx.pck and you may have to compare some fashion wings for human, giants and so on .
->Do whatever it takes to figure it out!
