Recently, the necessity of development of virtual reality technology has been highly increased in various fields. Especially in creative activities such as the design of industrial products, virtual reality technology enlarges ideas of designers if the designers can directly manipulate objects in virtual space just like in the real world. As a result, the efficiency of product development can be highly improved. In such activities, it is not too much to say that the most important operation is to deform shapes of virtual objects. And to realize the efficient and comfortable manipulability, it is desirable to show not only visual but also force sensation. In this paper, we propose the algorithm which enables deformation of virtual objects easily, inspired by tasks of carving an image in wood. In this method, the deformation is carried out but not moving points on the surface of virtual object but generating and/or vanishing points around the contact area. Thus we can easily generate various shapes with a reasonable feedback force.