here's a patch to get you started:

bicubic_patch {
  type 1
  flatness 0
  u_steps 8
  v_steps 8
  <-1, 0, 0> <-1, 0.5, 0> <-0.5, 1, 0> <0, 1, 0>
  <-1, 0, 0> <-1, 0.5, -0.5> <-0.5, 1, -0.5> <0, 1, -0.5>
  <-1, 0, 0> <-1, 0.5, -0.5> <-0.5, 0.5, -1> <0, 0.5, -1>
  <-1, 0, 0> <-1, 0, -0.5> <-0.5, 0, -1> <0, 0, -1>
 }

that's the left forward quad of the upper hemisphere
--
Dan D.

"Through the Eye of a Needle"
http://filebox.vt.edu/users/ddombrow/

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