1. A method for processing a three-dimensional (3D) mesh model, comprising: receiving a 3D mesh model; automatically detecting one or more regions including a potential sharp cusp; displaying the automatically detected one or more regions to a user and receiving input, from the user, designating an active region of the 3D mesh model; and applying sphere fitting and Laplacian smoothing to the designated active region to remove a sharp cusp therefrom and to obtain a modified 3D mesh model.