Smooth: this modifier smooths the mesh object by softening the angles between adjacent faces, propably shrinking the size of the original object during the process. Based on the Smooth function (Mesh Tools panel, Editing [F9] while in Edit mode).

• X, Y, Z: specifies the axis along which the modifier is applied
• Factor: define the amount of smoothing, from 0.0 to 1.0. Lower (including negative) or higher values can be used, but can deform the mesh object.
• Repeat: specifies the number of smoothing iterations
• VGroup: Vertex Group name to define which vertices are affected

Cast: this modifier alters the global shape of the mesh object so that it tends toward one of these three fundamental shapes: cuboid, cylinder or sphere. Based on the To Sphere function (Mesh Tools panel, Editing [F9] while in Edit mode) but extended to new shapes.

• Sphere, Cylinder, Cuboid: projection type to apply
• X, Y, Z: specifies the axis along which the modifier is applied
• Factor: defines the amount of deformation, usually from 0.0 to 1.0. Lower (including negative) or higher values can be used.
• Radius: Only deforms vertices within this distance from the center of the effect (leave as 0 for infinite)
• Size: size of projection shape (leave as 0 for auto)
• From radius: use radius as size of projection shape (0 = auto)
• VGroup: Vertex Group name to define which vertices are affected
• Ob: control object. If available, its location determines the center of the effect