This paper presents a novel mixed reality (MR) system for virtually modifying (e.g., denting, engraving, swelling) shape of real objects by using projection of computer-generated shade. Users of this system, which we call HYPERREAL, perceive as if the real object is actually being deformed when they operate the system to modify the shape of the object while only the illumination pattern of the real object is changed. The authors are aiming to apply this technology to product designing field: designers would be able to evaluate and modify form of their product more efficiently and effectively in an intuitive manner using HYPERREAL than conventional design process (typically, computer aided design, or CAD, systems and solid mock-ups) since the system is able to provide users with actuality/presence of real mock-up and flexibility of shape data on a computer system, such as CAD system, all at once.