So I'm playing with building rules lofts along splines by auto-generating the loft sections from a master sketch, then aligning them normal to the spline at a fixed interval.
It works really well! However, there's one small issue. Every once in a while, the loft "twists" between sections - the edges cross over to opposite points between two sections.
In the image below, I'm using a sketch of a rectangle, so each section consists of four points. All sections are the same dimenstions, they only differ in their position and orientation.
If I set the section interval to 5 feet or less, it looks fine (top picture), but once I set it to 6 feet or higher, the "twist" appears (bottom picture). The sections, incidentally, are about 12 feet wide and 1 foot thick.
Is this a bug or just something I don't understand about lofting?