The issue is that the fur is treated as underwear and is always displayed when there is no dedicated lower body image for a certain piece of armour. The example below is with the Untouchable, which (as most artifacts) has the armour doll image upper and lower parts combined. Even if I separate them (which I will do at some point, probably before 1.8 comes around), the "doubling" will still be present for all robes.
If it is too tricky to be done codewise, I can still make files for the lower body parts for all robes, but it's kinda redundant

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