Hmm. I suspect that in the right-most pic the shoe is tilted up, thus giving the impression of a curve in the x-axis (depending on your modeller - here I mean "from side to side"). Just a suggestion - flatten the whole of the sole in the x axis. If You are trying to match these shoes exactly, then the front "block" should extend a lot further back, and the heel should be tilted slightly backwards. If not of course, then all parameters are out the window... The curve in the side view is probable (just think what it would take to try to walk in these!) Good luck! Cheers, Diolma