disable smoothness by default

gyral_structure/scripts/gs_fit

@@ -24,7 +24,7 @@ parser.add_argument('--wdensity', default=1., type=float,
                     help='Weight of the cost of target density constraint across the surface')
 parser.add_argument('--wradial', default=0.1, type=float,
                     help='Weight of the radial constraint on the surface fibre density')
-parser.add_argument('--wsmoothness', default=1., type=float,
+parser.add_argument('--wsmoothness', default=0., type=float,
                     help='Weight of the smoothness contraint on the orientation between neighbouring voxels')
 parser.add_argument('-s1', '--first_rbf', default=20., type=float,
                     help='RBF Dipole size during the first optimisation step in mm (default: 20)')