Solid Loft getting twisted

I’m getting an unexpected result from Solid.Loft. The PolyCurves that are used as cross-sections are acquired from placed Revit families and they look fine. However, the resulting solid seems to reorder the curves, creating twisting kinks.

The problem only occurs when the family height parameter differs between instances.

Am I missing something?

loft.rvt (1.7 MB)

Hi Ned,

The order of the profiles are fine within your file however, try using some guide curves to help define the path between profiles:

loft.rvt (1.8 MB)


Hi David,

Funny, I never realized that its GuideCurveS (plural). Tried a single curve with bad results and never tried adding more.

Thanks for your help!