I think it might be Lightwave. I've seen lots of Lightwave type models like this on Japanese websites, including Poser-like babes. But they aren't Poser babes- they are "hand-made". There are a lot of model-makers in Japan and elsewhere that still prefer to create their own characters, just to show off how really great they are at modeling characters. That's also why I think people at Renderosity "Ain't Seen Nothin' Yet" when it comes to all the cool non-Poser made characters that exist out there, including realistic and anime types.