hello everyone, can anyone tell me how to extrude the complex polyline, please. I had try to extrude but it’s not in the right direction. I has sit in front of computer for 8 hours. 
Stereographic_projection.gh (57.5 KB)
Yes, very thunkful. It’s similar to what I want. Can just extrude a single surface. Not have thickness.Please~
Yes, I’m so thankful of you. But can I ask your help the last time. I want offset the extrude surface, and make sure every big one polygon and littele one polygon had 1.9mm gap.
I am sorry, please make a sketch because you have lost me.
An alternative and simpler way to generate this:
stereohexsphere.gh (9.9 KB)
(this works by using stereographic projection, but from 3d to 4d, then rotating in 4d and projecting back down to 3d again)
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I’m guessing this is what you want in the end:Stereographic_projection_ME.gh (54.8 KB)
Still in the old file, not Daniel’s file.
OK. I’ll try. Thanks for your suggestion.
Right. Thank you for the help. I can’t thank you enough. You’re a nice guy.