Originally Posted by
SKAshe
Technically they could do this the same way they did it with the breast slider. Specifically they would need to add two new bones to the skeleton, one for each butt cheek, then skin the butt part of every single variation of every single leg piece in the game to be influenced by said bone, then redo every single leg animation so that the leg motion looks right, then they would make it so that the slider scales said butt bone.
It's doable but would be such an obscene amount of work that I have no idea if it will ever be done. If they ever redo the body model like they did for the faces in dawntrail then that would be the time to do it. It would be easier per piece then the faces and a lot easier to make it look right, but there are hundreds of pieces so it honestly might take even longer then the faces did.
It might ironically be easier for them to just make differently scaled models of everything with like, 3 different butt sizes, then use shapekeys or something, like they already do with character jaw size, then just use the model that matches the player's chosen butt size.