ellipse ellipse 0 0 0 30 10
revsurf rs_ellipse ellipse 0 40 0 1 0 0
offset rs_ellipse_of rs_ellipse 5
mkface result rs_ellipse_of 0 1 0 1
set MaxFTol 9.9999999999999995e-08
set MaxETol 9.5796749076530655e-07
set MaxVTol 9.5796749076530697e-07