pbsplinecurve bspline_3d_p_nr 2 4 0 1 1 1 2 1 3 1  0 0 0 1  1 2 0 1  2 0 0 1
revsurf rs_bspline_3d_p_nr  bspline_3d_p_nr 0 0 0 0 1 0
offset rs_bspline_3d_p_nr_of  rs_bspline_3d_p_nr -.1
mkface result rs_bspline_3d_p_nr_of .3 .5 .3 .5
set MaxFTol 9.9999999999999995e-08
set MaxETol 4.7047338874526666e-07
set MaxVTol 4.7047338874526677e-07