When in Curves WB and creating a 3d B-Spline using orthogonal views of an object, certain level of care have to be taken, otherwise the B-Spline could adopt a non wished form because we make some mistakes.
I invite you yo take a look a this short video showing a comfortable way of minimizing the risks of making this kind of errors. I think you are going to like it.
Greetings.
May be you like this way to create a 3D Freehand B-Splines.
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Be nice to others! Read the FreeCAD code of conduct!
May be you like this way to create a 3D Freehand B-Splines.
I have uploaded many FreeCAD video tutorials to my YouTube channel