Hello,
I'm having an issue where even just selecting the "by poles" option in the Studio Spline dialog box un-constrains some of the points in my spline. (Please see screenshots below.) Is there a way to fix some of my spline points so that they don't move when I select "by poles"? I tried constraining the spline to a plane, as well as creating a point set to snap to as recommended here, but no luck so far. Thanks for reading!
Points where I want them
One point broken (sometimes more for more complicated splines)