Robert Dark Seducer armour alpha channel not rendering

[b3ars]

Using Robert's Female, and a matching replacer for the dark seducer armour.

 

When I look at the .dds texture for the Dark Seducer female armour, it looks like there's clearly an alpha channel making the edge 'frayed' or feathery.

But when I look at Dark Seducer armour in Nifskope or in-game, it's just a straight edge, picture: http://kriscrash.dk/aht/oblivion/1910_147.jpg

 

When I look at the vanilla armour, it is correctly transparent, and they are using the same texture as far as I can see.

 

What setting is preventing the alpha from being properly transparent?

 

(I might add it looks a LOT like the Golden Saint armour should've been transparent in the edges too, but the .dds files contain no alpha.. I'm thinking of modding that if we can figure this all out.)