I would like to achieve the following intersection between 3 pipes:

desired outcome

The final goal is to then extrude the centre triangle face outwards, and apply a subdivision modifier to get a smooth spike shape:

intersection with spike

My question is: How do I create such a Y-shaped intersection with an ico sphere and geometry nodes?

So far, I've created an ico sphere and applied a square curve profile along the edges. Next, I would like to somehow merge the intersecting profiles to create the desired intersections shown in the image above, but I have no idea how to do so.

ico sphere without smooth intersections

geometry nodes setup

  • $\begingroup$ Hello and welcome to Blender.SE! This is a very tricky and extensive task, which requires not only a good knowledge of Geometry Nodes, but also a relatively large number of nodes. In any case, an answer would go beyond the scope here, I'm afraid. But I might have an idea how to solve it. May I ask what exactly you want to do with it? $\endgroup$
    – quellenform
    Mar 27, 2023 at 0:05

1 Answer 1


May i suggest an alternative? You could use the dul mesh method.the link below might shed some light


  • $\begingroup$ While this link may answer the question, it is better to include the essential parts of the answer here and provide the link for reference. Link-only answers can become invalid if the linked page changes. - From Review $\endgroup$ May 7, 2023 at 8:38
  • $\begingroup$ I'm sorry for that.. didn't know about the rule.will keep in mind next time $\endgroup$ May 11, 2023 at 4:01

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .