Abstract: A method, apparatus, and software product generates deformation weights for application of a deformation function on a geometric model. The user, working directly on the points of the geometric model, including its surface, defines a deformation area having a focal region fully affected by the deformation and a falloff region only partially affected by the deformation. Deformation weights are then automatically calculated for all points in the regions affected by the deformation, using a technique that creates a smooth and natural decrease in weights from the focal region to the falloff region. Several options are available to the user to control and monitor deformation weight calculations and weighted blending, and to visualize the deformation weights themselves.