v 9.0 10.0
v 11.0 10.0
v 9.0 11.0
v 11.0 11.0
f 1 2 4 3
f 3 4 6 5
f 5 6 8 7
f 7 8 2 1
f 2 8 6 4
f 7 1 3 5
cstype bezier
deg 3
curv 1 2 3 4
end