# Creating a 4 branch manifold with set endpoints

**URL:** <https://discourse.shapr3d.com/t/creating-a-4-branch-manifold-with-set-endpoints/40792>\
**Category:** Modeling Questions\
**Created:** [May 12, 2026, 5:31pm UTC](https://discourse.shapr3d.com/t/creating-a-4-branch-manifold-with-set-endpoints/40792 "2026-05-12T17:31:22Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![TigerMike](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/tigermike/32/32650_2.png) [@TigerMike](https://discourse.shapr3d.com/u/TigerMike)\
**Post date:** [May 12, 2026, 9:24pm UTC](https://discourse.shapr3d.com/t/creating-a-4-branch-manifold-with-set-endpoints/40792/2 "2026-05-12T21:24:03Z")

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Are you trying to achieve something like this?

 ![exhaust manifold](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/c/4/c4d292d2285b807fee6c53ddc63cfbc9f5e16b79.jpeg)

If so, check this out.

> [@Spline between / across front and top planes](https://discourse.shapr3d.com/t/spline-between-across-front-and-top-planes/32290/7):
>
> Hi, Here is a possible way, with splines on two orthogonal planes to define 3D edge to sweep. A few hints: you need to add the external fillets at the pipes junctions before the shell command, in order to get smooth edges inside the pipes the order of the fillets 01 and 02 is important, as well not including tangent edges for fillet 02. I started with a small radius for fillet 02 because otherwise it fails before disabling tangent edges I applied a 0.99 scaling factor to the center pipe to g…

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_[View the full topic](https://discourse.shapr3d.com/t/creating-a-4-branch-manifold-with-set-endpoints/40792)._