This Blender plugin generates bezier curves, pipes and ribbons in elaborate weavings, based off of a framework mesh. Tested with Blender 4.0.
Go to Edit > Preferences > Add-ons and click Install.... Select celtic-knot-py, and click the checkbox to enable it.
Select any mesh, then run the plugin from the Add > Curves menu. Then tweak the generation parameters to suit your particular usage.
Further explanation and examples can be found in the [wiki](<https://github.com/boristhebrave/celtic-knot/wiki) on github.
Further external reading can be found at:
This code is licensed under the MIT License copyright Adam Newgas 2013.