Im going to try to help you:
You said youve removed the lower body texture dds at first, so maybe you can just remove a bit of that texture (with creating an alpha layer) where the undergarments are.
Here is what you need to make invisible of the texture:
To my knowledge, the part that hides the vagina, is what is surrounded with black. So maybe you could just remove that part.
If its not (check it by checking upskirt while wearing the outfit, lol) then it should be the blue part.
So, if im not mistaken, if you remove just the black part, and nothing else, and still keep both the lower and upper body together, we have the vixen outfit, alongside the stockings that come with the vixen outfit.
Its just that with your last attempt, you have copied the upper part of the lahr arcien stockings onto the vixen outfit.
And as it self, the vixen outfit comes with stockings:
So, would it be possible to keep the stockings of the second picture intact, and change the outfit only so that it a pantyless outfit?
Thanks in advance again :)
Cheers, Mara
Btw, if you want me to retype this text in japanese, i can try to put all this text in google translate, and then pm it to you :)