I think you need to surbdivide a surface instead using NGon or Lunchbox grasshopper addons.
Does this help?
TestNGon.gh (9.8 KB)
For instance if you are using rhino6:
I think you need to surbdivide a surface instead using NGon or Lunchbox grasshopper addons.
Does this help?
TestNGon.gh (9.8 KB)
For instance if you are using rhino6: