Autodesk.com has a fantastic article about the whole process that Street Fighter IV went through, from Ikeno's sketches until reaching our televisions at home.
From the article: " While Street Fighter IV keeps the gameplay and distinctive characters for which it is famous, it adds mind-blowing, next-generation visuals, a move sure to appeal to fighting game enthusiasts, past fans of the series, and everyone in between.
Dimps Corporation was involved in all production stages of Capcom’s Street Fighter IV. Autodesk interviewed the development team members to see how they used Autodesk products to work their magic."
Check the full article here.