I'm currently trying to figure out how the PolyExtrude node when plugging in an input curve.

I'm currently expecting the extrusion to follow the curve in local space relative to the primitive normal.

However, this does not appear to be the case, as I appear to get some sort of rotational offset. I can fix this offset by using the "Transform Extruded Front" and manually snapping the "front" prim to the end of the curve, however, it only works along one plane, and not in the other planes, which means that as a procedural workflow, it would very easily break.

I understand that I can probably get a similar result with a different node combo (ie Sweep/PolyWire), but am more curious about how Houdini is applying this extrusion.